Best Cold Email Software in 2026: 9 Tools Compared

Cold email software is two purchases: a sequencer that runs campaigns, follow-ups and replies, and the mailboxes, domains and warmup it sends from. On their own pricing pages (checked November 12, 2026), sequencers start at $29 to $69 a month, and a complete setup for 1,000 cold emails a day costs from about $109 to about $440 a month, depending on which pair you choose. Solo senders, agencies, SDR teams and teams that run outreach through AI agents need different tools, and this guide matches each of the nine to one of those cases.

We make Outreach2day, so it is one of the nine cold email tools here. The others are in no particular order, and each section says what the tool does better than we do.

Cold Email Software at a Glance

Entry prices are monthly billing from each vendor's pricing page. "Sells mailboxes" means you can buy sending accounts from the vendor itself.

Two Parts: the Sequencer and the Sending Setup

The sequencer is the part most reviews of an email outreach platform compare: campaign steps, contact upload, sending schedules, rotation across mailboxes, a shared inbox for replies and stats. Instantly, Smartlead, lemlist, Saleshandy, Reply.io, Woodpecker, Mailshake and GMass are sequencers first.

The sending setup is domains, mailboxes on them, SPF, DKIM and DMARC records, and two weeks of warmup before the first cold email. Most sequencer plans let you connect unlimited mailboxes, but the mailboxes themselves cost extra, either from the vendor's add-on store or from a separate provider.

That split is why entry prices mislead. A $39 plan with 6,000 sends a month covers about 270 emails a sending day; at 1,000 a day you need a bigger plan and around 40 mailboxes, which can cost more than the software. For the line-by-line cost of a whole program, including leads and verification, see how much cold email costs.

The Nine Tools

Instantly

Instantly is a cold email platform with unlimited connected email accounts and warmup on every plan. Growth costs $47 a month for 5,000 emails and 1,000 uploaded contacts, Hypergrowth $107 for 125,000 emails and 25,000 contacts, and Light Speed $358 for 500,000 emails; yearly billing brings them to $37.60, $85.58 and $286.30 a month. The API is on all plans, and webhooks start on Hypergrowth.

Mailboxes come from its own store: done-for-you Google accounts at $5 a month, AirMail accounts at $4, pre-warmed Google accounts at $10, and domains at $15 a year. Lead data is a separate Credits subscription from $9 a month for 150 credits. Instantly has a 14-day trial with 1,000 emails and 250 contacts, no card needed.

Where it is stronger than Outreach2day: a B2B contact database (SuperSearch, on credits) and Google accounts in its own store. Details: Instantly pricing, Instantly review, Outreach2day vs Instantly.

Smartlead

Smartlead's Base plan is $39 a month for 6,000 sends and 2,000 contacts, Pro $94 for 90,000 sends and 30,000 contacts, Unlimited Smart $174 for 150,000 sends and Unlimited Prime $379 for 500,000 sends. Every plan connects unlimited email accounts. The API and webhooks start on Pro.

Its SmartSenders store sells Google and Outlook mailboxes through Zapmail at $4.50 a month plus $13 a year per domain, Outlook through InfraInbox at $5 plus $16, SMTP through Mailreef at $3.99 plus $19, and pre-warmed Google or Outlook at $9 plus $18. The trial is 14 days, no card.

Where it is stronger: white-label client workspaces at $29 a month each from Pro, with three included in Unlimited Prime. Details: Smartlead pricing, Smartlead review, Outreach2day vs Smartlead, Instantly vs Smartlead.

lemlist

lemlist's Email plan is $69 a month for 50,000 emails with unlimited users and senders, or $55 a month billed yearly. It includes lemwarm, the API, and lemlist's MCP server and CLI. The Multichannel plan is $109 per user a month ($87 yearly) with LinkedIn and SMS automation and 5 senders per user.

Mailboxes bought inside lemlist start at $10 a month for Google or Outlook and $5 for SMTP; a domain has to be bought with them, purchases are non-refundable and the domain is locked for a year. Lead enrichment is an add-on from $20 a month for 2,000 credits.

Where it is stronger: LinkedIn and SMS steps in the same sequence as email. Details: lemlist pricing, lemlist review, Outreach2day vs lemlist.

Saleshandy

Saleshandy's Starter plan costs $41 a month for 6,000 emails, 2,000 active prospects and 1,500 Lead Finder credits. Pro is $99 for 100,000 emails, 10 users and 4,000 credits, and Scale is $189 for 200,000 emails with unlimited users and white label. Email accounts are unlimited on every plan, and the API is on every plan. The trial lasts 7 days and caps sending at 100 emails.

Its Email Infrastructure add-on sells mailboxes on look-alike domains: $2.99 a month on an annual fixed term, $3.49 on annual flexi (25 mailboxes minimum) or $3.99 on a quarterly term, plus $14 a year per domain.

Where it is stronger: lead credits inside the sequencer plan and white label on Scale. Details: Saleshandy pricing, Saleshandy review.

Reply.io

Reply.io prices by active contacts a month. The Email Volume plan is $59 per user for 1,000 contacts and $99 per user for 5,000; from 10,000 contacts it becomes a flat $179 a month with unlimited users, rising to $999 for 100,000. Multichannel is from $99 per user, LinkedIn is a $69 add-on per account, and the Jason AI SDR starts at $500 a month, with separate AI SDR plans from $800 on monthly billing.

Mailboxes bought through Reply.io cost $5 a month each, up to 5 per domain, with domain prices by TLD; pre-warmed mailboxes are $15 a month on $25-a-year domains. Warmup and the API are listed on all plans.

Where it is stronger: calls, SMS and LinkedIn tasks in one sales engagement tool, and an AI SDR product. Details: Reply.io pricing, Reply.io review, Outreach2day vs Reply.io.

Woodpecker

Woodpecker is a cold email tool that now prices by emails sent: $39 a month for 5,000, $79 for 50,000, $119 for 100,000 and up to $999 for 1,000,000. Every plan has unlimited email accounts and team members, and a set number of free warmups (3 on the smallest plan, 10 on the 50,000 plan, 30 on the 250,000 plan); up to 20 more warmups are $5 a month per account. The trial runs 14 days or 100 sent emails, whichever ends first.

Mailboxes from Woodpecker cost $6 a month for Google or Microsoft and $4 for Maildoso or Mailforge addresses. The API, webhooks, MCP server and CLI are one $20-a-month add-on.

Where it is stronger: the Agency Panel at $27 a month per active client, with white label at $5 per client. Details: Woodpecker pricing.

Mailshake

Mailshake bills per user. Starter is $29 a month for 1,500 emails and one email address, Email Outreach $49 with unlimited emails and two addresses, and Sales Engagement $99 with ten addresses. Warmup is unlimited on all three. Ready to Use Mailboxes are a $12-a-month add-on. There is no trial: payment is taken up front.

Where it is stronger: unlimited warmup on every plan and a per-user price a small team can predict. Details: Mailshake pricing.

GMass

GMass runs inside Gmail. Standard is $29.95 a month for one Google account without sequences or follow-ups, Premium $39.95 adds follow-up sequences, the API, A/B tests and triggered emails, and Professional $59.95 adds MultiSend rotation; yearly billing is $20, $29 and $49 a month. Team plans start at $175 a month for 5 users.

Where it is stronger: nothing to set up for one person who already sends from Gmail. It does not sell mailboxes. Details: GMass pricing, GMass review.

Outreach2day

Outreach2day sells standard SMTP/IMAP mailboxes on your own domains at $2.50 a mailbox a month, with warmup, a sequencer, a shared reply inbox and per-mailbox analytics in that price. The minimum is 12 mailboxes, so the smallest bill is $30 a month; a .com domain is $13 a year. Mailboxes are ready within 24 hours and warm for 14 days before the first cold email.

It runs alone or as the sending setup for another sequencer: mailboxes sync to Instantly and Smartlead over an API key, and CSV export matches the import format of 14 tools. A REST API and an MCP server with 24 tools let an AI agent check domains, quote orders, start warmup, build and launch campaigns and read replies; orders are quoted over the API and paid by a person on a Stripe page.

Where others are stronger: there are no Google Workspace or Microsoft 365 mailboxes, no white-label portal, and the MCP server has no lead database, list verification or LinkedIn. Details: Outreach2day pricing, all mailbox vendors compared.

What 1,000 Cold Emails a Day Costs With Each Stack

The same volume priced across stacks: 1,000 cold emails a sending day, 22 sending days (22,000 emails a month), 25 cold emails per mailbox a day, so 40 mailboxes on 8 domains. Software is the cheapest plan that covers 22,000 emails; mailboxes and domains are the vendor's own list prices, turned into a monthly figure. Rows are sorted by monthly total.

Smartlead Base, Instantly Growth and Saleshandy Starter stop below 22,000 emails, so the next plan up is used. Saleshandy mailboxes are on the quarterly $3.99 term. Reply.io needs the 10,000-contact tier because a three-step sequence at 1,000 emails a day reaches about 7,300 new contacts a month. lemlist and Reply.io do not publish a flat domain price.

Woodpecker at the same volume: the $79 plan covers 22,000 emails but warms at most 30 accounts (10 included plus 20 extra), so warming all 40 mailboxes inside Woodpecker takes the 250,000 plan. That is $219, plus $160 for 40 mailboxes at $4, about $8 for domains and $50 for 10 extra warmups, about $437 a month.

Taxes and card fees are left out; on Outreach2day the card fee of 2.9% + $0.30 applies to new domains and the first month of mailboxes. To run the same arithmetic at your own volume, use the cold email cost calculator.

How to Choose by Team Type

Solo founder or one seller

At a few hundred emails a day, one plan and a handful of mailboxes cover it. GMass works if you already send from one Gmail account, with follow-ups from the $39.95 Premium plan. Instantly Growth at $47 includes 5,000 emails, with its contact database sold on credits. Outreach2day starts at 12 mailboxes ($30); if you need only 1 to 5 mailboxes, a provider with no minimum costs less.

Agency with client accounts

The questions are separate workspaces per client, who owns each domain, and whether the client sees your brand. Smartlead sells white-label client workspaces at $29 a month each, Woodpecker an Agency Panel at $27 per active client with white label at $5, and Saleshandy includes white label on Scale ($189). Outreach2day workspaces and team members are free, and the domain registrant can be the client, though there is no white-label portal. More in cold email infrastructure for agencies.

SDR team with several channels

If reps need LinkedIn, calls and SMS next to email, pick a sales engagement tool. lemlist Multichannel is $109 per user with LinkedIn and SMS automation. Reply.io Multichannel is from $99 per user, with LinkedIn at $69 an account and the Jason AI SDR from $500 a month. For the email side of either, mailboxes on your own domains keep sending volume separate from the reps' main inboxes.

Teams running outreach through AI agents or code

Check what the API and MCP server can do before you compare prices. Instantly and Saleshandy list the API on every plan, Smartlead from Pro, GMass from Premium, and Woodpecker bundles API, MCP and CLI for $20 a month. lemlist includes its MCP server and CLI on the Email plan. Outreach2day's API covers domains, mailboxes, warmup, campaigns and replies, and its MCP server connects to Claude, ChatGPT, Cursor and other clients; see MCP servers for cold email.

Where Outreach2day Fits, and Where It Does Not

Outreach2day fits a team that wants mailboxes, warmup and a sequencer on one bill, or a team that keeps Instantly or Smartlead and wants SMTP mailboxes on its own domains synced into it. At 40 mailboxes the bill is $100 a month plus $13 a year per .com domain, with warmup, the sequencer and analytics at $0.00 on the invoice, and warmup inbox, spam and bounce rate are shown for each mailbox. Outreach2day measures placement and does not guarantee it.

It does not fit if you need Google Workspace or Microsoft 365 mailboxes, a white-label client portal, fewer than 12 mailboxes, or a self-serve trial. There is no self-serve free trial; a free 10-mailbox test is available on request. Domains bought in the app do not renew automatically, and mailboxes are deleted when you cancel.

FAQ

What is cold email software?

Cold email software, also called cold emailing software or an email outreach platform, sends personalized first emails and follow-ups from mailboxes you connect and stops a sequence when someone replies. Most tools add warmup, mailbox rotation and a shared reply inbox. For what counts as cold email in the first place, see what is cold email.

How is it different from email marketing or a bulk sender?

Email marketing tools send newsletters and promotions to a list that opted in. Cold email software sends one-to-one emails from many small mailboxes on your own domains, a few dozen per mailbox a day. More in bulk email sender software.

Do I need a separate tool for mailboxes?

You need mailboxes from somewhere. Every sequencer above connects mailboxes you already have, and most sell their own through an add-on store. A separate infrastructure provider is worth comparing once you need dozens of mailboxes, because the mailbox line grows faster than the software line. See the mailbox vendor comparison and email warmup tools.

Is there free cold email software?

Most tools have a short trial with limits: Instantly 14 days with 1,000 emails, Smartlead 14 days, Woodpecker 14 days or 100 emails, Saleshandy 7 days with 100 emails. Mailshake takes payment up front. Outreach2day has no self-serve free trial; a free 10-mailbox test is available on request.

How many mailboxes do I need for 1,000 cold emails a day?

About 40 mailboxes at 25 cold emails each a day, on 8 domains at 5 mailboxes per domain. New mailboxes need 14 days of warmup first, so plan the setup two weeks before the campaign.

Can I use Outreach2day mailboxes in Instantly or Smartlead?

Yes. You connect Instantly or Smartlead with an API key, and new mailboxes are exported as soon as they are created, warming ones included. For other tools, the SMTP/IMAP logins and a CSV export work. See Instantly integration and Smartlead integration.

Sources

Prices and plan limits from each vendor's own pages, checked November 12, 2026: Instantly pricing, Smartlead pricing, lemlist pricing and lemlist mailbox prices, Saleshandy pricing, Reply.io pricing, Woodpecker pricing, Mailshake pricing, GMass pricing, Outreach2day pricing.