Best Free Cold Email Software for Small B2B Teams (2026)

If you want free cold email software with a genuine no-expiry tier, start with Sendvanta's free plan: $0 forever, 1,000 active leads, 3,000 emails a month, and up to 10 of your own SMTP mailboxes. Apollo's free tier is the better pick if you also need contact data, and Mailmeteor or GMass work for tiny Gmail-only sends under 50 a day.

The word "free" does a lot of lifting in this category. Roughly half the tools that rank for it offer a 14-day trial and call it free. Another chunk gives you a free plan that can't send — you can build sequences and stare at them, but sending requires a card. The list below separates tools with a real, indefinite free tier from tools that just have a trial, and tells you exactly where each ceiling sits.

Sendvanta — best overall free tier for B2B outbound

Best for: a founder or two-to-five-person sales team that wants a full sequencing and deliverability stack without a card on file.

The free plan is $0 forever with no credit card: 1,000 active leads, 3,000 emails per month, and up to 10 of your own SMTP mailboxes active at a time. That last number is the one that matters. Most free tiers cap you at one mailbox, which means you're stuck at whatever a single inbox can safely send — realistically 20-40 cold emails a day. Ten mailboxes at conservative volume gets you into the 200-300/day range, which is enough to run a genuine pipeline test rather than a toy campaign. (The mailbox math is here if you want to size it properly.)

What you actually get on the free plan, not a stripped demo version: multi-step personalized sequences, gradual mailbox warm-up using real labeled messages inside your own workspace, layered deliverability health scoring across mailbox, domain, DKIM, and IP with automatic slow-down when risk thresholds are crossed, SpamAssassin spam-scoring of drafts before you send, bot-aware engagement classification so security scanners don't inflate your open and click numbers, suppression lists and one-click unsubscribe by default, and unified reply handling across every connected mailbox.

Honest limitations. 3,000 emails a month is about 100 a day — fine for testing an ICP or running a low-volume, high-value list, not enough for an agency running five clients. Free workspaces can be suspended after a month of inactivity, so it's not a good place to park a dormant campaign. You bring your own leads; Sendvanta doesn't sell lists, so if you have no data source you'll need one. And managed mailboxes ($4/mo each) and domain registration ($20 one-time) are paid-plan features — on free, you connect your own Gmail, Microsoft 365, or SMTP/IMAP boxes.

Pricing: Free $0 forever. Starter $29/mo, Growth $59/mo, Pro $99/mo, Enterprise custom. Connecting your own mailboxes stays free on every plan. See features for the full breakdown.

Apollo.io — best free tier if you need the data more than the sender

Best for: teams with no contact list who want to prospect and send from one place.

Apollo's free tier gives you a monthly allowance of credits against a very large B2B contact database plus basic sequencing. If your bottleneck is "I don't know who to email," that's worth more than a better sending engine. The Chrome extension for pulling contacts off LinkedIn is genuinely good.

Honest limitations. The free credit allowance goes fast, data accuracy varies a lot by region and company size, and the sending side is the weakest part of the product — deliverability tooling, warm-up depth, and mailbox rotation are thinner than in purpose-built senders. Plenty of teams end up using Apollo for data and something else for sending. Details in the Sendvanta vs Apollo comparison.

Pricing: free tier, then published pricing starts around $49/user/mo.

Snov.io — free trial plan with finding, verifying, and light sending

Best for: solo operators who want email finding, verification, and a small drip sequence in one subscription.

Snov.io's free plan runs on a shared credit pool covering both search and verification, with basic drip campaigns on top. It's a reasonable all-in-one for a first 100 prospects.

Honest limitations. Credits deplete quickly when verification eats into the same pool as search, the sequence builder is simple, and the deliverability instrumentation is basic — you won't get spam-score previews or seed-based inbox-placement testing.

Pricing: free tier with limited credits; published pricing starts around $30/mo.

Mailmeteor — best free option for a one-off Gmail merge

Best for: sending a personalized announcement to 40 people from a Google Sheet this afternoon.

Mailmeteor is a Gmail add-on. Point it at a spreadsheet, write a template with merge fields, send. Setup takes about five minutes and there's nothing to learn. Privacy posture is better than most add-ons — it doesn't hoard your contact data.

Honest limitations. The free tier caps around 50 emails a day, and it's a merge tool, not a sequencer — follow-ups, reply detection, mailbox rotation, and deliverability monitoring are either absent or bolted on. Sending cold volume from your primary Google Workspace address is also a bad idea for reasons covered in should you use your main domain for cold email.

Pricing: free tier, paid plans from around $10/mo.

GMass — best free option if you refuse to leave Gmail

Best for: people who want mail-merge and basic follow-ups inside the Gmail compose window.

GMass lives entirely in Gmail. It handles merges, auto follow-ups that stop on reply, and list building from Gmail search results — that last trick is underrated for re-engaging old threads.

Honest limitations. The free tier is capped near 50 emails a day and stamps a footer on outgoing mail. It's single-mailbox by design, so you can't rotate across ten inboxes to spread volume, and everything you send is tied to your real Google account.

Pricing: free tier; published pricing starts around $25/mo.

Mautic (self-hosted) — free as in "you're the sysadmin now"

Best for: technical teams with an ops person who'd rather spend hours than dollars.

Mautic is open source and genuinely free to licence. You control the data completely and there are no seat or contact limits beyond what your server handles.

Honest limitations. It's built for marketing automation to opted-in lists, not cold outbound. You'll wire up your own SMTP relay, bounce handling, warm-up process, and deliverability monitoring — and you'll own every incident at 11pm. Between hosting, an SMTP provider, and your own time, "free" typically costs more than a $29/mo plan by month two.

Trials that market themselves as free

Smartlead, Instantly, lemlist, and QuickMail all show up in searches for free cold email software. None of them has a free tier that lasts — you get roughly 14 days, sometimes gated behind a card. They're good products; they just aren't free. If you're evaluating them, the comparison pages for Smartlead, lemlist, and QuickMail cover the trade-offs. Entry tiers generally land between $30 and $60/mo.

What to check before you commit to any free plan

• Mailbox count, not just email count. A 5,000-email allowance on one mailbox is unusable — you can't safely push more than about 40 cold emails a day through a single inbox. Ten mailboxes at 30/day beats one mailbox at any limit.
• Does warm-up come with it? Warm-up is usually the first thing paywalled. If it's missing, you're sending from cold infrastructure and your reply rate will tell the story within a week.
• Bounce and suppression handling. Free tiers that skip automatic suppression and one-click unsubscribe put your domain at risk. This isn't a nice-to-have; it's compliance.
• Does the tool proxy your mail? Some cheap and free senders route through shared IP pools. Your reputation then depends on strangers. Sending through your own mailboxes is slower to set up and far safer.
• Export. Can you get your leads, sequences, and reply history out? If not, the free plan is a trap with a nice UI.
• Inactivity rules. Several providers (Sendvanta included) suspend free workspaces after a period of no use. Fine if you know about it, annoying if you don't.

A realistic first 30 days on a free plan

Register a separate sending domain rather than using your primary one. Set up SPF, DKIM, and DMARC properly — the plain-English setup guide takes about twenty minutes to work through. Connect three to five mailboxes on that domain and warm them for two to three weeks before touching a real prospect. Then start at 10-15 emails per mailbox per day and climb slowly.

With five warmed mailboxes at 20/day you're sending roughly 2,000 emails a month — comfortably inside a 3,000-email free allowance, and enough to validate whether your offer lands before you spend anything. If replies come in and you need more volume, that's the moment paid plans start earning their keep.

Where Sendvanta fits

Sendvanta's free plan exists because most cold email fails on infrastructure, not copy, and you shouldn't need a credit card to find that out. You get sequencing, warm-up on your own mailboxes, layered deliverability health scoring that slows or pauses sending when risk climbs, spam-scoring before send, seed-mailbox inbox placement tests, bot-aware engagement classification, and unified reply handling — at $0 forever with 1,000 leads, 3,000 emails a month, and 10 SMTP mailboxes. When you outgrow it, Starter is $29/mo. Bring your own leads and your own mailboxes; nothing is proxied through shared IPs.

Methodology: this comparison was compiled in February 2026 from publicly listed plan pages and hands-on use of the free tiers. Pricing changes often — verify current numbers with each vendor before you commit.