Unify's Free plan is the cheapest real starting point at $0, with no time limit, and it's built for founders, solo GTM operators, and first BDR hires who need to test cold email before spending anything. Among paid options, Saleshandy and Mailshake bundle mailbox warmup at $25 to $29 a month, while a $30 to $50 blaster with no warmup can end up costing more per reply once bounces and spam placement are counted. This guide ranks nine real tools by cost per landed reply, not sticker price.

Key Facts at a Glance

Every price and stat cited in this article is centralized below, with its source and verification date, so you don't have to hunt through nine vendor pricing pages yourself.

Methodology and Limitations

Every price above is the lowest advertised paid tier or free tier listed on each vendor's own public pricing page, confirmed by rendering the live page on July 31, 2026. Nothing here is pulled from memory or an older cached price.

"Cheapest" is defined qualitatively as cost per landed reply: sticker price adjusted for how much of that sending volume is likely to actually reach an inbox, rather than sticker price alone. We did not run a controlled, side-by-side inbox-placement test across all nine tools ourselves. EmailToolTester, which ran the most cited independent seed-list inbox-placement test in this space, publicly retired that exact methodology in December 2025 because seed lists had become unreliable, so no current head-to-head inbox-placement leaderboard exists for these specific tools.

Reply and open-rate context comes from named Unify customer case studies (Spellbook, CandorIQ, Justworks) and from EmailToolTester's 2026 aggregate deliverability testing across major email service providers, not from vendor marketing claims. What this piece does not score: LinkedIn and dialer feature depth, annual-contract enterprise pricing above the entry tier, and region-specific sending compliance (see the edge cases section below for GDPR-sensitive sending).

What's the Cheapest Cold Email Tool Right Now?

The honest answer splits three ways depending on what kind of cheap you're solving for. For free-to-start, Unify's Free plan costs $0 with no expiration and includes real AI-native list building and sequencing rather than a stripped demo.

For cheapest-at-volume, Woodpecker's usage-based pricing floors out near $7 per 100 contacted prospects, which undercuts flat per-seat plans if your list is small. For cheapest-that-lands, meaning the lowest realistic cost once you factor in deliverability, Saleshandy and Mailshake both bundle mailbox warmup for free at their $25 to $29 monthly entry tiers instead of charging extra for it the way some competitors do.

None of those three answers is wrong. They just optimize for different constraints, which is exactly why a flat sticker-price ranking misses the point.

The 9 Cheapest Cold Email Tools, Ranked by Cost per Landed Reply

Below are nine real, named tools ranked by what they cost once deliverability posture, not just sticker price, is factored in. Every entry uses the same five fields so you can compare like for like.

1. Unify: the only genuinely free, non-time-boxed pick

What it is: Unify is outbound AI for sellers, an agentic platform where reps find, research, write, and send from a single chat, backed by a database of 1.1B+ contacts and 65M+ companies pulled from 40+ data sources.

Best for: Founders, solo GTM operators, and first BDR hires who want to test whether cold email works before committing budget, and who want AI to help write and prioritize, not just send.

Entry price: Free plan is $0 forever for up to 3 seats, with AI outbound, the full contact and company database, and multi-channel sequencing included, not a stripped trial. Base is $20 per seat per month with 800 credits per seat, unlimited seats, AI email copywriting, and phone and email enrichment added.

Deliverability posture: Free and Base include one mailbox per seat that you connect yourself. Fully managed deliverability, meaning done-for-you mailbox warming, automatic bounce prevention, and deliverability analytics, is bundled starting on Unify's custom-priced Business plan, the same place several tools on this list put their best deliverability tooling behind a paywall. What makes that tier worth the honest mention here: named customers report real outcomes from it. Spellbook's email open rates went from 19 to 25% in HubSpot to 70 to 80% in Unify, and CandorIQ's bounce rate dropped 87%, from 15% to under 2%.

Stop rule: If you need fully managed warmup and bounce protection bundled at the cheapest possible price point today, Unify's Free and Base tiers don't include that either, same honest caveat that applies to most tools on this list. Pair Free or Base with basic warmup discipline (see the edge cases section) until you're ready to scale into Business.

Ready to see what a genuinely free tier can do before you spend a dollar? Sign up for Unify and start building your first list.

2. Instantly: unlimited warmup bundled, but hard caps at entry

What it is: Instantly is a cold email sending platform built around unlimited connected mailboxes and built-in warmup, plus an add-on lead database and AI sales agent tools.

Best for: Teams that want to connect many mailboxes under one flat price without paying per-inbox warmup fees.

Entry price: The Growth plan is $47 per month, with unlimited email accounts and unlimited email warmup included, capped at 1,000 uploaded contacts and 5,000 emails sent per month.

Deliverability posture: Warmup ships free and unlimited at the entry tier, which is a genuine strength. There's no permanently free tier, so you're paying $47/month from day one just to test the channel.

Stop rule: If your list or send volume regularly exceeds 1,000 contacts or 5,000 emails a month, budget for the next tier up before you hit the wall mid-campaign.

3. Smartlead: cheaper than Instantly annually, but verification costs extra

What it is: Smartlead is a cold email infrastructure platform with warmup, email rotation, and add-on dialer and email verification products.

Best for: Teams that want the lowest possible warmup-included monthly price and don't need built-in CRM or API access at the entry tier.

Entry price: Base plan is $39/month billed monthly, or $32/month if billed annually, covering 2,000 contacts and 6,000 email sends per month, with warmup pool included as a "Foundation tier" feature.

Deliverability posture: Warmup is bundled free at the entry tier. Verified prospect emails beyond the included 2,000 cost an extra $59/month add-on, and CRM access, API access, and dedicated support are not available until higher tiers.

Stop rule: If you plan to lean on Smartlead's email verification heavily, price in the $59/month add-on before comparing this to Saleshandy or Mailshake, where verification is either included or cheaper as an add-on.

4. Saleshandy: the cheapest named paid tier with warmup included

What it is: Saleshandy is an email outreach platform bundling unlimited sending accounts, warmup, and a separate lead-finder product.

Best for: Budget-conscious solo operators who want the lowest all-in monthly price among the paid tools compared here.

Entry price: Outreach Starter is $25/month billed annually ($300/year), or $36/month billed monthly, with a 7-day free trial, unlimited email accounts, 2,000 active prospects, and 6,000 emails per month.

Deliverability posture: Saleshandy explicitly states that every plan allows unlimited connected email and warm-up accounts to improve deliverability, so warmup is bundled free even at Starter. Email verification is a separate add-on at $19 per 5,000 recipients.

Stop rule: The 7-day trial is short. Have your first sending domain and list ready before you start the clock, or you'll burn most of the trial on setup instead of testing sends.

5. QuickMail: warmup included, but the lowest caps on this list at its price

What it is: QuickMail is a cold email platform built around inbox rotation across unlimited senders, including LinkedIn accounts.

Best for: Small teams that want unlimited email and LinkedIn senders under one login without per-channel add-ons.

Entry price: Starter plan is $49/month with a 14-day free trial, unlimited email and LinkedIn senders, but only 1,000 uploaded contacts and 5,000 emails sent per month.

Deliverability posture: Free AutoWarmer (branded MailFlow) ships included at Starter, which is a real cost saver versus tools that charge for warmup separately.

Stop rule: At $49/month for only 5,000 emails, this is the highest cost-per-email among the flat-fee tools here unless you're specifically using the bundled LinkedIn sending. Reassess if you're email-only.

6. Woodpecker: usage-based pricing that scales down for small lists

What it is: Woodpecker is a cold email and LinkedIn outreach tool priced by contacted prospects rather than a flat seat fee.

Best for: Very small lists or teams that want to pay only for what they actually contact, not a flat monthly floor.

Entry price: Usage-based at $7 per 100 contacted prospects. The default view on Woodpecker's own pricing page shows 500 contacted prospects at $35/month, which includes 8,000 emails and 2,000 stored prospects free, plus a 14-day trial capped at 100 free cold emails, whichever limit comes first.

Deliverability posture: Catch-all email verification, unlimited team members, and unlimited email accounts are free on every plan. Two warm-ups are included free; additional warmup capacity is a paid add-on.

Stop rule: Usage-based pricing that looks cheap at 500 contacts can grow fast at scale. Model your actual monthly contacted-prospect volume before assuming this stays the cheapest option as you grow.

7. Lemlist: the most expensive entry tier, but deliverability is bundled everywhere

What it is: Lemlist is a multichannel outbound platform combining email, LinkedIn, calling, SMS, and WhatsApp sequencing with a built-in lead database.

Best for: Teams that want multichannel reach bundled in rather than stitched together from separate tools, and are willing to pay more for it.

Entry price: The Email plan is $69/month billed monthly, or $55/month billed annually, with unlimited users and 50,000 emails per month, well above the caps on cheaper tools.

Deliverability posture: Lemlist's pricing page lists its Deliverability Hub, mailbox warm-up, rotating IPs, and deliverability alerts as included in all plans, including the entry Email tier, which is a genuine differentiator at this price point.

Stop rule: At $55 to $69/month, this is the most expensive tool on this list at entry. Only choose it over cheaper options if you'll actually use the higher 50,000-email cap or need multichannel sequencing from day one.

8. Mailshake: unlimited warmup and verification at the lowest price, but tight sending caps

What it is: Mailshake is an email automation platform built for small sales teams, with add-on data finder and ready-to-use mailbox products.

Best for: Solo senders or very small teams who want both warmup and verification unlimited and included, not add-ons, at the lowest price on this list alongside Saleshandy.

Entry price: Starter is $29/month billed monthly, or $25/month billed annually, with one email address per account, 1,500 email sends per month, and unlimited uploaded contacts.

Deliverability posture: Unlimited email warmup and unlimited email verification are both included at Starter, a stronger deliverability bundle than several pricier tools on this list.

Stop rule: 1,500 sends per month and one mailbox per seat is a hard volume ceiling. If you need more than one sending identity per person, you'll need to add users, which adds cost fast.

9. Apollo: free, but the sequencing you need to actually send cold email is gated

What it is: Apollo is a B2B database and sales engagement platform with a large free tier for contact lookups and a paid path to sequencing.

Best for: Teams that primarily need contact data and light sequencing, and are comfortable adding a separate warmup tool.

Entry price: Independent reporting on Apollo's free plan puts it at roughly 900 credits per seat per year, with most of the features that matter for real cold email volume, including sequences, advanced filters, and SSO, gated to paid tiers.

Deliverability posture: The same independent review found no integrated mailbox warm-up on Apollo, meaning you bring your own, and no native bounce-shield to auto-pause a mailbox that crosses a bounce threshold.

Stop rule: If "free" is the only reason Apollo is on your shortlist, confirm your actual send volume fits inside the free credit allowance and that you have a separate warmup plan, or the real cost shows up later as a burned domain.

How Should You Choose Between These Nine Tools?

Match the tool to your actual constraint, not to whichever one has the lowest number on its pricing page.

• If you're pre-revenue and just testing whether cold email works at all, start on a plan that doesn't expire, Unify's Free plan or Woodpecker's low-usage floor both fit.
• If you're sending from a domain you can't risk losing, prioritize built-in warmup over raw price, Saleshandy, Mailshake, and Instantly all bundle it free at entry.
• If you're running high volume on disposable domains and already warm and verify separately, a bare-bones sender like Smartlead or Woodpecker is genuinely cheaper.
• If you want multichannel reach bundled instead of stitched together from three tools, Lemlist's higher entry price buys more channels per dollar.
• If you're a first BDR hire who needs AI to help write and prioritize, not just send, an AI-native workflow like Unify's Free or Base tier earns its price differently than a pure sender.
• If your team is five or more reps sharing one list, prioritize unlimited-seat pricing over per-seat pricing, Unify Base, Instantly, and QuickMail all avoid per-seat cost creep.
• If "free" is your top priority, verify what free actually includes before committing, since Apollo's free tier and Unify's free tier are not the same kind of free.

What Should You Actually Look for in a Budget Cold Email Tool?

Evaluate any budget cold email tool, including ones not on this list, against seven vendor-neutral criteria before comparing price tags.

1. Entry price and what it actually includes, not just the headline number.
2. Whether mailbox warmup ships free at the entry tier or costs extra.
3. Whether email verification and bounce protection are bundled or a paid add-on.
4. Sending and contact caps at the entry tier, in emails per month and stored contacts.
5. Whether there's a genuinely permanent free tier versus a time-limited trial.
6. Multichannel reach at the entry tier, meaning email only versus LinkedIn, calls, or SMS.
7. The seat and workspace pricing model, since per-seat costs compound differently than unlimited-seat pricing as a team grows.

How Unify covers this: Unify is the only tool on this list with a permanently free tier that includes real AI-native list building across 1.1B+ contacts and 65M+ companies, multi-channel sequencing, and 40+ data sources, not a time-limited trial. Base adds AI email copywriting and enrichment at $20 per seat per month with unlimited seats. Managed deliverability lives on the Business plan rather than the entry tiers, the same tradeoff most tools on this list make, but named customers Spellbook, CandorIQ, and Justworks all report measurable open-rate and bounce-rate gains from that layer once they scaled into it. That combination, real free tier now plus a proven managed path later, is why Unify ranks first here on cost per landed reply rather than sticker price.

What Does the Cost-per-Landed-Reply Math Actually Look Like?

Here's a simplified, illustrative walkthrough of why sticker price alone is misleading. Assume a team sends 5,000 cold emails a month on a $30/month tool with no built-in warmup, and a comparable 5,000 emails a month on a $50/month tool with warmup and bounce checking bundled.

If the unwarmed domain lands 60% of sends in the inbox (a plausible outcome given the 83.1% average deliverability EmailToolTester found across tested platforms, worse for a cold, unwarmed domain) and gets a 2% reply rate on delivered mail, that's roughly 60 replies a month for $30, or about $0.50 per reply. If the warmed domain lands 90% of sends and gets the same 2% reply rate, that's about 90 replies a month for $50, or roughly $0.56 per reply, similar cost per reply despite the higher sticker price, and the warmed setup keeps producing results instead of degrading as the domain's reputation erodes over time.

For a real, sourced example of what happens when a team fixes the deliverability side of that equation, CandorIQ's founding SDR consolidated a fragmented stack (Apollo for lists and sequencing, LinkedIn Sales Navigator, and a separate web-intent tool) into one platform and cut bounce rate from 15% to under 2%, an 87% reduction, while attributing $1.8M in pipeline to the consolidated motion, per Unify's CandorIQ case study.

Does the Cheapest Tool Change by Role or Team Type?

Yes, the right budget pick shifts depending on who's buying and how the team operates.

• Solo founder, testing part-time: Stay on a free tier until the channel proves itself. Don't add a paid tool before you've booked meetings from a manual test batch.
• First BDR or SDR hire at a funded startup: Prioritize unlimited seats and AI-assisted writing so ramp time stays short as you add reps.
• Small agency running outbound for clients: Prioritize workspace and whitelabel pricing over a single-seat entry price, since Saleshandy, Woodpecker, and QuickMail all have agency-specific add-ons.
• RevOps buyer evaluating for a 3 to 10 person team: Weight CRM sync and per-seat cost at your real headcount over the lowest single-seat entry price, since per-seat costs compound faster than they first appear.

What Are the Most Common Mix-Ups When Comparing Cheap Cold Email Tools?

A few recurring confusions distort most budget comparisons.

• Free tier vs. free trial: Several "free" cold email options are 7 to 14 day trials, not permanent tiers. Check the expiration before counting a tool as your ongoing sending platform.
• Warmup included vs. warmup as an add-on: Some vendors bundle warmup at the entry tier; others charge per mailbox once you exceed a small included allotment. Read the cap, not just the word "included."
• Per-seat vs. usage-based pricing: A per-contact model like Woodpecker's looks cheap at low volume and can cost more at scale than a flat per-seat plan. Model your real monthly volume before comparing sticker prices.
• Personal inbox vs. dedicated sending domain: Sending cold email from a personal Gmail account is a different risk profile than a dedicated domain. Factor in whether a tool requires, or helps you avoid, a dedicated domain.
• "Delivered" vs. actual inbox placement: A dashboard showing "delivered" is not the same as landing in the primary inbox. Independent ESP testing consistently finds a gap between the two, averaging 83.1% actual deliverability.

For a deeper walkthrough of the domain-risk side of this, see how to scale outbound prospecting without burning your domain, and for how bundled versus metered pricing plays out across the broader sales automation category, see this breakdown of bundled vs. metered sales automation pricing.

When Should You Stop Sending or Switch Tools?

A few signals mean stop sending immediately rather than optimizing further.

What Are the Top Mistakes to Avoid When Picking a Budget Tool?

• Comparing sticker price without checking what's capped at that price, whether contacts, sends, or seats.
• Treating a 7 to 14 day free trial as if it were a permanent free tier.
• Skipping mailbox warmup to save a few dollars, then burning the sending domain in month one.
• Buying verification and warmup as afterthought add-ons instead of pricing them in from the start.
• Picking the cheapest per-seat tool for a five-plus person team without confirming whether seats are unlimited or metered.

Frequently Asked Questions

What is the cheapest cold email tool?

Unify's Free plan is the cheapest real starting point at $0 forever, with no time limit, covering AI-native list building and multi-channel sequencing. Among paid tools, Saleshandy ($25/month billed annually) and Mailshake ($25 to $29/month) currently have the lowest entry prices with mailbox warmup included. The honest answer depends on whether you weigh sticker price alone or cost per landed reply, which also counts deliverability.

Is there a free cold email tool?

Yes. Unify offers a permanently free plan, not a trial, that includes AI-native prospecting, enrichment, and multi-channel sequencing at $0. Apollo also has a free tier, reported at roughly 900 credits per seat per year, but independent testing shows most outbound features like sequencing get gated fast and warmup is not included. Most other budget tools on this list offer a 7 to 14 day free trial rather than a permanent free tier.

Is cheap cold email software worth it?

It depends on what the low price excludes. A sub-$30/month tool without built-in mailbox warmup or bounce checking can cost more per reply than a pricier tool, because a burned domain stops generating replies entirely. Cheap software is worth it when warmup and verification are bundled, or when you already run those separately. It's a false economy when the sticker price hides the deliverability cost.

What's the cheapest way to send cold email at scale?

At real volume, usage-based pricing like Woodpecker's (from $7 per 100 contacted prospects) or unlimited-mailbox flat plans like Instantly's Growth tier ($47/month for unlimited accounts and warmup) tend to scale cheaper per email than per-seat tools with hard sending caps. The cheapest approach at scale is almost always to spread volume across multiple warmed mailboxes rather than pushing more volume through fewer inboxes.

Does cheap cold email hurt deliverability?

Not inherently, but cheap tools that skip warmup or bounce checking do. Independent deliverability testing across email platforms found an average deliverability rate of 83.1%, meaning roughly 1 in 6 emails never reach an inbox. The price itself doesn't cause the problem. Sending without warmup, verification, or sending-limit discipline does, and several budget tools bundle those protections for the same price as ones that don't.

What is cost per landed reply?

Cost per landed reply is a tool's monthly price divided by the number of replies you actually get from emails that reached an inbox, not just emails sent. A $25/month tool that lands 40% of sends and gets a 2% reply rate can cost more per reply than a $55/month tool that lands 85% of sends at the same reply rate, because far more of the cheaper tool's sends never had a chance to be read.

How much does cold email software typically cost per month?

Entry-level paid plans for the budget tools compared here run from about $25 to $69 per month as of July 2026, with most landing between $30 and $50 for a single sender. Free options exist but vary widely in what they actually let you send. Add-ons for extra warmup, verification, or dedicated mailboxes typically add another $3 to $60 per month depending on volume.

Edge Cases: Regional and Compliance Differences

Budget pricing doesn't account for regional sending rules, which can change the real cost of a cheap tool. In the United States, cold B2B email is generally permitted under CAN-SPAM with an unsubscribe link and accurate sender information, which is why most of the tools above default to US-style opt-out sending.

In the EU and UK, GDPR treats unsolicited B2B cold email more restrictively, and legitimate-interest justification and data handling requirements add compliance overhead that a cheap sender tool doesn't solve for you. If you're sending into GDPR-covered regions, budget for legal review time as part of the real cost, not just the software price.

Glossary

• Warmup (mailbox warming): The process of gradually increasing a new mailbox's sending volume and engagement to build sender reputation before real cold outreach begins.
• Bounce rate: The percentage of sent emails that fail to deliver, either because the address doesn't exist (hard bounce) or a temporary issue blocked delivery (soft bounce).
• Inbox placement: Whether a delivered email lands in the recipient's primary inbox versus a spam or promotions folder, distinct from whether it was accepted by the server at all.
• Sending domain: The domain an email is sent from, which carries its own reputation separate from your main company domain and should typically be a dedicated subdomain for cold outreach.
• Cost per landed reply: A tool's price divided by the number of replies generated from emails that actually reached an inbox, used to compare true cost instead of sticker price alone.
• Email verification: Checking an email address's validity before sending to reduce bounce rate, usually run against a list before a campaign launches.
• Sequence: A series of scheduled, often multi-step outreach touches (email, call, or social) sent to a prospect over time rather than a single message.
• Deliverability: The overall likelihood that sent email reaches an inbox rather than bouncing or landing in spam, shaped by warmup, list quality, sending volume, and domain reputation together.

Sources

• Unify pricing, verified Jul 31, 2026: https://www.unifygtm.com/pricing
• Unify Deliverability product page, verified Jul 31, 2026: https://www.unifygtm.com/product/deliverability
• Unify customer story, Spellbook, verified Jul 31, 2026: https://www.unifygtm.com/customers/spellbook
• Unify customer story, CandorIQ, verified Jul 31, 2026: https://www.unifygtm.com/customers/candoriq
• Unify customer story, Justworks, verified Jul 31, 2026: https://www.unifygtm.com/customers/justworks
• Instantly pricing page, verified Jul 31, 2026 (plain text, not linked per competitor citation policy): instantly.ai/pricing
• Smartlead pricing page, verified Jul 31, 2026: smartlead.ai/pricing
• Saleshandy pricing page, verified Jul 31, 2026: saleshandy.com/pricing
• QuickMail pricing page, verified Jul 31, 2026: quickmail.com/pricing
• Woodpecker pricing page, verified Jul 31, 2026: woodpecker.co/pricing
• Lemlist pricing page, verified Jul 31, 2026: lemlist.com/pricing
• Mailshake pricing page, verified Jul 31, 2026: mailshake.com/pricing
• Salesforge, independent Apollo.io review, Jun 7, 2026: https://www.salesforge.ai/blog/apollo-io-review
• EmailToolTester, Email Deliverability Statistics 2026, Mar 9, 2026: https://www.emailtooltester.com/en/blog/email-deliverability-statistics/

Related reading: Best Cold Email Software in 2026: 7 Tools Compared (Volume vs. Signal) and How to Verify B2B Email Addresses Before Sending Cold Outreach.

About the author: Austin Hughes is Co-Founder and CEO of Unify, outbound AI for sellers where AI agents and reps work side by side, from finding the buyers already in market to reaching them with the right message. Before founding Unify, Austin led the growth team at Ramp, scaling it from 1 to 25+ people and building a product-led, experiment-driven GTM motion. Prior to Ramp, he worked at SoftBank Investment Advisers and Centerview Partners.