5 Cheapest Cold Email Software Tools in 2026 (Compared)
Looking for the cheapest cold email software? 5 tools priced at 1,000 to 25,000 emails a month, with a free plan, subscriptions and pay-as-you-go compared.
The cheapest cold email software depends on how many emails you send, so this guide prices 5 tools at 1,000 to 25,000 emails a month instead of ranking them by sticker price.
Disclosure: we make Alienmail, which is on this list. Every price below comes from the tool's own pricing page.
The short answer: For most cold email senders, Alienmail is the cheapest cold email software: 5,000 emails cost $12, 10,000 cost $24, and there's no monthly fee. The cheapest subscriptions are SalesBlink and SmartReach at $29 a month for 10,000 emails. ReachInbox has the only free plan that keeps working (250 emails a month). Above about 15,000 emails a month, a flat plan wins: PlusVibe is $37 for 25,000.
The cheapest cold email software isn't the one with the lowest sticker price. Some tools charge per month with an email cap, some charge per email, and one has a free plan that's really a test. The only fair comparison is what your actual volume costs, so that's where this guide starts.
What 1,000 to 25,000 cold emails a month costs on each tool
The table shows the cheapest plan that covers each volume, on monthly billing. Where the entry plan can't send that much, the cell names the next plan and its price.
Tool | Pricing model | 5,000 | 25,000 |
|---|---|---|---|
Alienmail | Pay per email | $12 | $50 |
SalesBlink | Subscription, 10,000 emails | $29 | $99 (Unlimited) |
SmartReach.io | Subscription, 10,000 emails | $29 | $89 (Plus) |
ReachInbox | Free 250 emails; Starter 10,000 | $39 | $99 (Growth) |
PlusVibe | Subscription, 25,000 emails | $37 | $37 |
Alienmail: 4 credits per email, cheapest top-up that covers the month. Prices checked 4 Nov 2026.
Two things stand out. Below 15,000 emails a month, pay-per-email is cheapest, because you aren't paying for sends you don't use. Above it, a flat plan with a big allowance (PlusVibe's 25,000) costs less per email than any credit tier.
The 5 cheapest cold email tools
1. Alienmail: pay per email, no subscription
Best for: founders, small teams and agencies whose volume changes month to month.
Alienmail charges per email instead of per month. Each email uses 4 credits, and credits get cheaper as you top up more: $1.00 per 1,000 credits at $5, $0.60 at $10, $0.40 at $50 and $0.30 at $250. The minimum top-up is $5 (1,250 emails), credits last 12 months, and warmup is free on every inbox you connect. The AI reads your website, writes your sequences and sends from inboxes it warms for you.
Price: from $5. 5,000 emails $12, 25,000 $50, 100,000 $160. 100 free credits on signup, no card.
Included: free warmup on unlimited inboxes, AI-written sequences, list verification, a unified inbox. Extra mailboxes $2.50 each.
Watch out for: above about 15,000 emails a month a flat plan can be cheaper; see the table.
See Alienmail pricing · Start free with 100 credits
2. SalesBlink: $29 for 10,000 emails
Best for: small teams that want a cheap monthly plan with unlimited inboxes.
Price: Starter $29 a month ($25 billed yearly). 14-day trial, no card.
Included: up to 10,000 emails, unlimited email accounts, unlimited warmup, AI sequences. Google Workspace inboxes $4 and Outlook $5 as add-ons.
Watch out for: the next plan is $99 if you pass 10,000 emails.
3. SmartReach.io: $29 for 10,000 emails
Best for: teams that want free email verification bundled in.
Price: Email Outreach Basic $29 a month. Free trial.
Included: 10,000 emails, 1,000 active prospects, unlimited sending accounts, 10 warmup accounts, free email verification.
Watch out for: the 1,000 active prospect cap fills fast if you follow up a lot; Plus is $89.
4. ReachInbox: a real free plan, then $39
Best for: testing a dedicated platform before paying.
Price: Free plan, $0. Starter $39 a month ($30 billed yearly).
Included on free: 3 email accounts, 250 emails a month, 50 active leads, warmup for 14 days. Starter adds 10,000 emails, 2,000 leads and unlimited warmup.
Watch out for: 250 emails a month is a test, not a campaign; the yearly price is what most comparisons quote.
5. PlusVibe: $37 for 25,000 emails
Best for: steady volume of 15,000 to 25,000 emails a month on a fixed budget.
Price: Personal $37 a month ($30.80 billed yearly). Free trial with 1,000 emails and 3 inboxes.
Included: 25,000 emails, basic warmup, sender rotation, unlimited campaigns.
Watch out for: at 5,000 emails you pay the same $37, which is three times Alienmail's $12.
Cheapest cold email software compared
Tool | Starting price | Pricing model | Emails included | Warmup | Free plan or trial |
|---|---|---|---|---|---|
Alienmail | $5 top-up | Pay per email | 1,250 for $5; 5,000 for $12 | Free, unlimited inboxes | 100 free credits, no card |
SalesBlink | $29 a month | Subscription | 10,000 | Unlimited | 14-day trial |
SmartReach.io | $29 a month | Subscription | 10,000 | 10 accounts | Free trial |
ReachInbox | $0; $39 a month | Free plan + subscription | 250 free; 10,000 on Starter | 14 days free; unlimited on Starter | Free plan |
PlusVibe | $37 a month | Subscription | 25,000 | Basic | Free trial, 1,000 emails |
Monthly billing unless stated. Checked 4 Nov 2026 on each tool's pricing page.
Subscription vs pay-as-you-go: which is cheaper?
At 5,000 emails a month, a $39 subscription costs $0.0078 per email and Alienmail costs $0.0024. The subscription only catches up once you use most of its allowance every month.
Monthly subscription. You pay a fixed amount whether you send or not. $39 a month for a 6,000-email plan, used for 5,000 emails, is $0.0078 per email. Skip a month and the cost per email that month is infinite.
Pay-as-you-go. You buy credits and spend them as you send. On Alienmail, 5,000 emails is 20,000 credits, which the $10 tier covers at $0.60 per 1,000, so $12, or $0.0024 per email. A quiet month costs $0, and credits last 12 months.
Where it flips. Flat plans with big allowances win at steady, high volume. PlusVibe's $37 for 25,000 emails is $0.0015 per email; Alienmail's $50 for the same is $0.0020. If you send 25,000 or more every single month, a flat plan is cheaper.
Your situation | Cheapest model |
|---|---|
Volume changes month to month, or you pause between campaigns | Pay per email |
Under 15,000 emails a month | Pay per email |
Steady 25,000+ every month | Flat subscription with a large allowance |
Testing a tool before paying | A free plan or free credits |
Several clients or team members | Check seat, workspace and inbox charges first |
Free plans: what you can and can't test
Two of the five let you start without paying. ReachInbox has a free plan with no end date, and Alienmail gives 100 credits on signup. They test different things.
ReachInbox free plan: 3 email accounts, 250 emails a month, 50 active leads and warmup for 14 days. Enough to learn the interface and send a small test, not enough for a campaign. After day 14, warmup stops unless you move to Starter at $39.
Alienmail free credits: 100 credits is 25 emails, so the sending test is smaller. Warmup on every connected inbox is free with no time limit, the AI writes your first sequence from your website, and nothing expires on day 14. When you're ready to send more, the first top-up is $5.
If you want to test deliverability over a few weeks, the free warmup matters more than the free sends.
How to work out what cold email software really costs
The software is one line on the bill. Add mailboxes, domains, lead data and verification, then divide by the emails you send.
Total monthly cost = software + mailboxes + domains + lead data + verification
Cost per 1,000 emails = total cost ÷ emails sent × 1,000
Example for 10,000 emails a month from 12 inboxes on 4 domains:
Line | Alienmail | $39 subscription |
|---|---|---|
Software | $24 | $39 (if 10,000 is within the plan) |
12 mailboxes | $30 ($2.50 each) or your own Workspace seats | $84 (12 × $7 Workspace) |
4 domains | about $4 a month | about $4 a month |
Verification | Included | Included or add-on |
Total | about $58, $5.80 per 1,000 | about $127, $12.70 per 1,000 |
Your numbers will differ, but the method holds: price the whole setup, not the plan.
Frequently asked questions
What is the cheapest cold email software? Alienmail. It has no monthly fee and charges per email: 5,000 emails cost $12 and 10,000 cost $24, against $29 a month for the cheapest subscriptions (SalesBlink, SmartReach) and $37 to $39 for PlusVibe and ReachInbox. Above about 15,000 emails a month, PlusVibe's $37 plan for 25,000 emails is cheaper.
Is there completely free cold email software? ReachInbox's free plan sends 250 emails a month from 3 accounts, with warmup for the first 14 days. Alienmail gives 100 free credits on signup with no card, enough to send 25 emails and test the writer, and its warmup stays free on every inbox with no time limit. Neither replaces a paid plan for a real campaign.
Is pay-as-you-go cold email software cheaper than a subscription? Up to about 15,000 emails a month, yes: $12 for 5,000 on Alienmail against $29 to $41 on a subscription. Past 25,000 emails every month, a flat plan with a big allowance is cheaper per email.
How much does cold email software cost? The cheapest subscriptions on this list are $29 a month for 10,000 emails (SalesBlink, SmartReach), $37 for 25,000 (PlusVibe) and $39 for 10,000 (ReachInbox). Pay-per-email starts at $5 on Alienmail. Add mailboxes ($2.50 to $7 each), domains and lead data on top.
Which cheap cold email tools allow unlimited email accounts? SalesBlink and ReachInbox Starter include unlimited email accounts, and SmartReach allows unlimited sending accounts with 10 in warmup. Alienmail has no inbox cap: connect as many as you like, each warmed for free, and buy extra mailboxes at $2.50 if you need them. Keep each inbox to about 30 cold emails a day, which is Alienmail's guidance, and add inboxes rather than volume.
Do I have to pay extra for warmup? Not on any of the five. Alienmail, SalesBlink and ReachInbox Starter include unlimited warmup, PlusVibe includes basic warmup, and SmartReach includes 10 warmup accounts on its $29 plan. ReachInbox's free plan stops warmup after 14 days.
Is cheap cold email software good enough for an agency? Yes, if the plan's seat, workspace and inbox rules fit. Alienmail charges per email with free warmup on every inbox, so adding clients doesn't add a subscription. On per-user tools such as Mailshake ($29 per user), each team member adds a seat.
Key terms
Pay-as-you-go (pay per email): you buy credits and spend them as you send, with no monthly fee.
Flat plan: a fixed monthly price with a cap on emails or contacts.
Per-seat pricing: the price multiplies by the number of users.
Free plan vs free trial: a free plan keeps working with small limits; a trial gives the full product for a set number of days, then stops.
Inbox rotation: spreading a campaign across several inboxes so each stays under a safe daily volume.
