7 Best Cold Email Outreach Tools B2B in 2026 (Free and Paid, Compared)

Quick comparison

The best cold email outreach tools b2b

#1

Instantly

Best for: B2B teams that send high-volume cold email and want unlimited mailboxes and warm-up in one flat price

★★★★★★★★★★4.8/5 on G2 (4,165 reviews, checked Nov 2026)

Visit instantly.ai

Starting price$47/month (Growth, billed monthly; $37.60/month billed annually)

Free planNo — 14-day free trial

Instantly is built for teams that measure outreach in volume. Growth costs $47 a month and removes the mailbox math other tools force on you: unlimited email accounts, unlimited warm-up, 1,000 uploaded contacts and 5,000 emails a month, with replies from every mailbox landing in Unibox. The 450M+ B2B lead database sits behind the same subscription, and the AI email writer drafts the first version of each sequence.

The catch is credits. Growth includes 1,500 Instantly credits a month for lead data and enrichment, and heavy list-building burns through them fast. Hypergrowth at $107 a month lifts the caps to 25,000 contacts and 125,000 emails. Buy Instantly when you send at scale and want one flat price; buy Smartlead when you run outreach for clients and need a master inbox per workspace.

What we like

• Unlimited email accounts and unlimited warm-up on the entry plan, so scaling mailboxes does not raise the subscription
• Growth includes 5,000 emails a month and 1,000 uploaded contacts, with a 450M+ B2B lead database behind it
• AI email writer and AI agents are included from Growth, not held for the top tier
• Unibox gathers replies from every connected mailbox in one inbox

Watch out for

• Lead data runs on credits: Growth includes 1,500 Instantly credits a month, and more costs extra
• Reviewers report that domains bought through Instantly stay registered to Instantly and cannot be transferred if you leave
• The interface gets crowded once you run many campaigns at once, and setup takes learning

#2

Smartlead

Best for: Agencies and sales teams running cold email for several clients from one account

★★★★★★★★★★4.5/5 on G2 (466 reviews, checked Nov 2026)

Visit smartlead.ai

Starting price$39/month (Base, billed monthly; annual billing saves 17%)

Free planNo — free trial, no credit card required

Smartlead is the agency favorite in this list because it charges by volume, not by seat. Base costs $39 a month and covers 2,000 contacts, 6,000 sends and 2,000 verified emails, with unlimited email accounts and warm-up included. The master inbox pulls replies from every mailbox and client into one place, and SmartDelivery checks inbox placement before a campaign goes out.

The limits sit on the edges. CRM access is not part of Base, white-label costs $29 a month per client workspace, and email verification is a paid add-on. Pro at $94 a month lifts the volume to 30,000 contacts and 90,000 sends. Pick Smartlead when you run outreach for several clients; pick Instantly when a single team sends the most email for the lowest flat price.

What we like

• Unlimited email accounts on every plan, so mailbox rotation costs nothing extra
• Master inbox collects replies from unlimited mailboxes and clients in one place
• SmartDelivery tests inbox placement before you send, and warm-up runs in the background
• API and CLI cover nearly every action, so agencies can script mailbox swaps and reporting

Watch out for

• CRM access is not included on Base, which makes contact management harder on the entry plan
• White-label is a $29/month add-on per client workspace, not part of the entry price
• Reviewers say billing and credit rules are not always clear, and the interface has a learning curve

#3

Lemlist

Best for: Sales teams that want personalized email plus LinkedIn steps in one sequence

★★★★★★★★★★4.6/5 on G2 (2,627 reviews, checked Nov 2026)

Visit lemlist.com

Starting price$69/month (Email, billed monthly; $55/month billed annually)

Free planNo — 14-day free trial

Lemlist wins on personalization. The Email plan costs $69 a month and gives unlimited users and senders, which no per-seat tool in this list matches. LemAgent and the AI personalization tools write custom intro lines, images and landing pages for each lead, drawing on a 650M+ lead database with waterfall enrichment, while lemwarm warm-up and the deliverability hub run in the background.

The trade-off is credits and channels. Lead data, enrichment and buying signals all draw from a credit balance that costs extra, and LinkedIn steps need the Multichannel plan at $109 a month. The interface also feels crowded, and duplicate detection across campaigns is weak. Choose Lemlist when personalization drives your reply rate; choose Reply when you need calls and SMS in the same sequence.

What we like

• Unlimited users and senders on the Email plan, so adding teammates costs nothing extra
• lemAgent and AI personalization write custom intro lines, images and landing pages per lead
• lemwarm warm-up and deliverability hub are included on every plan
• A 650M+ lead database with waterfall enrichment sits inside the same subscription

Watch out for

• Lead data, enrichment and buying signals run on credits that cost extra beyond the plan
• Multichannel steps need the $109/month plan ($87 annual), so LinkedIn is not in the entry price
• The interface feels crowded, and duplicate detection across campaigns is weak

#4

Apollo.io

Best for: B2B teams that want the lead database and the sequencer in one subscription

★★★★★★★★★★4.7/5 on G2 (9,857 reviews, checked Nov 2026)

Visit apollo.io

Starting price$65/user/month (Basic, billed monthly; $49/user/month billed annually)

Free planYes — free plan (limited credits, 2 sequences)

Apollo is the only tool here that replaces two subscriptions: the lead database and the sequencer. Basic costs $65 per user a month, or $49 on annual billing, and covers unlimited sequences, advanced filters, open and click tracking, and Salesforce and HubSpot integrations. The free plan stays free with no time limit, so a founder can start prospecting before paying anything.

The bill is where Apollo gets expensive. Per-seat pricing means three reps cost $147 a month on annual billing, and mobile numbers cost 8 credits each, so data overages add up quickly. AI-assisted writing and the dialer wait for Professional at $99 per user a month. Buy Apollo when you need data and sending in one place; buy Instantly when you already have your lists.

What we like

• One subscription covers the contact database, enrichment and email sequences
• Free plan stays free with no time limit, so small teams can start without paying
• Unlimited sequences on Basic, with Salesforce and HubSpot integrations included
• Rated 4.7/5 on G2 from nearly 10,000 reviews, the largest review base here

Watch out for

• Per-seat pricing means the bill grows with every rep: three seats on Basic cost $147 a month on annual billing
• Credits run out fast: mobile numbers cost 8 credits each, so data overages add up
• AI-assisted writing and the dialer wait for Professional at $99/user/month

#5

Reply.io

Best for: SDR teams that run email, LinkedIn, calls and SMS from one sequence

★★★★★★★★★★4.6/5 on G2 (1,568 reviews, checked Nov 2026)

Visit reply.io

Starting price$59/user/month (Email Volume, billed monthly; $49/user/month billed annually)

Free planNo — 14-day free trial

Reply is the most complete sales engagement platform in this list. Email Volume costs $59 per user a month, or $49 on annual billing, and covers 1,000 active contacts with unlimited emails and mailboxes, warm-up on every mailbox, and 50 live data credits a month. Conditional sequences can then branch across email, LinkedIn, calls, SMS and WhatsApp from a single builder.

Email Volume is email-only, which is the catch. LinkedIn costs $69 a month per account, calls and SMS cost $29, and the full Multichannel plan is $99 per user a month. The price also climbs with active contacts: 5,000 contacts cost $99 per user a month. Pick Reply when your reps work several channels; pick Lemlist when personalization matters more than calls.

What we like

• Conditional sequences combine email, LinkedIn, calls, SMS and WhatsApp in one builder
• Unlimited emails and mailboxes on Email Volume, with warm-up on every mailbox
• AI email assistant and AI reply handling help draft and sort replies
• Built-in B2B database with live data credits for finding and enriching contacts

Watch out for

• Email Volume is email-only: LinkedIn costs $69 a month per account and calls and SMS $29
• The price climbs with active contacts: 5,000 contacts cost $99/user/month, 10,000 cost $179
• Jason AI SDR starts at $500 a month billed annually, far above the entry plan

#6

Woodpecker

Best for: Small teams that put deliverability first and want a low flat price without per-seat fees

★★★★★★★★★★4.5/5 on G2 (105 reviews, checked Nov 2026)

Visit woodpecker.co

Starting price$35/month (Cold Email, billed monthly; $24/month billed annually)

Free planNo — 14-day free trial

Woodpecker is the careful sender's tool. The Cold Email plan costs $35 a month, or $24 on annual billing, and covers 500 contacted prospects a month with unlimited contacts storage, unlimited email verification, three warm-ups and unlimited team members and email accounts. Free warm-up, inbox rotation, adaptive sending and ESP matching all aim at one thing: landing in the primary inbox.

The entry cap is the limit to watch. Five hundred prospects a month runs out fast for an active team, and Growth at $126 a month is a steep next step. There is no built-in lead database, so you bring your own lists, and API access costs $20 a month extra. Choose Woodpecker when deliverability matters more than volume; choose Smartlead when you need scale.

What we like

• Flat price with unlimited team members and unlimited email accounts, so headcount never raises the bill
• Free warm-up, inbox rotation, adaptive sending and catch-all verification are built in
• Pricing follows contacted prospects, so you pay for outreach volume, not seats
• AI email writer and AI interest-level detection sort replies by buying intent

Watch out for

• 500 contacted prospects a month on the entry plan runs out fast for active teams
• No built-in lead database: you must bring your own contact lists
• The prospect-based price ladder jumps steeply: Growth is $126 a month

#7

Mailshake

Best for: Solo reps who want the simplest cold email sequencer at the lowest entry price

★★★★★★★★★★4.7/5 on G2 (380 reviews, checked Nov 2026)

Visit mailshake.com

Starting price$29/user/month (Starter, billed monthly; $25/user/month billed annually)

Free planNo — no free trial

Mailshake is the simplest tool in this list, and the cheapest way in. Starter costs $29 per user a month, or $25 on annual billing, and covers one email account, 1,500 sends a month, email sequences and mail merge. Setup is fast — G2 reviewers most commonly report going live in under a day — and the three-plan ladder is easy to understand: Email Outreach at $49 and Sales Engagement at $99.

The simplicity has edges. There is no free trial, so payment is collected up front before you send anything, and Starter's single mailbox and 1,500-send cap mean a growing team pays per seat to scale. There is no built-in lead database either; contact data comes through the paid Data Finder add-on. Pick Mailshake for a solo rep starting out; pick Instantly for volume.

What we like

• The cheapest entry price here at $29/user/month, with a simple three-plan ladder
• Setup is fast: most users go live in under a day, according to G2 reviewers
• Sales Engagement at $99/user/month adds LinkedIn automation and unlimited dialer minutes
• Rated 4.7/5 on G2, the joint-highest score in this list

Watch out for

• No free trial: payment is collected up front before you send a single email
• Starter allows one mailbox and 1,500 sends a month, so scaling means paying per seat
• No built-in lead database: contact data comes through the paid Data Finder add-on

The best cold email outreach tools b2b teams buy do two jobs at once: they get the first email into the primary inbox, and they keep the follow-ups going until a prospect replies. We ranked the seven tools below by fit for the most common buyer — a small B2B sales team running outbound for the first time — starting with the highest-volume sender and ending with the simplest starter, and every price was checked on November 5, 2026.

How to choose the best cold email outreach tools b2b

• Count seats before you count features. Instantly, Smartlead, Lemlist and Woodpecker charge a flat price no matter how many people use them, while Apollo.io, Reply.io and Mailshake charge per seat. A three-person team triples the headline price on the per-seat tools.
• Check warm-up and inbox rotation first. A tool without warm-up, rotation and verification will burn your domain's reputation in the first month. Every tool here includes warm-up, but the depth of deliverability monitoring varies — Woodpecker and Instantly lead on it.
• Decide whether you need lead data in the same subscription. Apollo.io, Instantly and Lemlist bundle a database; Woodpecker and Mailshake do not, so budget for a data tool or a list provider on top.
• Match the channels to your motion. Email-only teams waste money on multichannel platforms. Buy Reply.io or Lemlist Multichannel only when reps actually work LinkedIn, calls or SMS every week.
• Read the cap that forces your next upgrade. Woodpecker caps contacted prospects, Reply.io caps active contacts, Mailshake caps sends and mailboxes. The cap you hit first is your real starting price, not the headline.

Outbound is one half of the pipeline: if the business also needs to be found by buyers who search, our guide to B2B email marketing software covers the inbound side. And before you send a campaign, run your subject lines through the free SERP snippet preview tool — it shows exactly how a title reads in a crowded inbox-style list, which is a useful proxy for subject-line length.

Whatever you shortlist, trial it with a real list before you pay for a year. The 14-day trials in this list are long enough to warm up a mailbox, send one genuine sequence and read the reply data — and that week tells you more than any review can. Check two things in the trial: that replies land in one inbox without manual forwarding, and that bounced addresses are suppressed automatically. Every tool here handles both, but the quality of the reply handling differs, so test it with your own data.

Cold email outreach pricing: what you will actually pay

Take a three-rep B2B team sending to about 5,000 prospects a month. On monthly billing, the subscription costs $39 on Smartlead Base, $47 on Instantly Growth, $69 on Lemlist Email, $87 on Mailshake Starter (three seats at $29), $126 on Woodpecker Growth, and $195 on Apollo.io Basic (three seats at $65) or $177 on Reply.io Email Volume (three seats at $59). Two of those numbers need adjusting before they are real: Woodpecker Starter at $35 covers only 500 contacted prospects, so a 5,000-prospect team needs Growth, and Mailshake Starter covers only one mailbox and 1,500 sends per seat, so a team sending 5,000 emails a month per rep outgrows it fast.

Over a year on monthly billing, that is $468 on Smartlead, $564 on Instantly, $828 on Lemlist, $1,044 on Mailshake, $1,512 on Woodpecker Growth, and $2,124 each on Apollo.io and Reply.io. The same three reps and the same 5,000 prospects cost $468 a year at the cheap end and $2,124 at the dear end — a $1,656 gap that comes entirely from per-seat pricing and prospect caps, not from features. Annual billing narrows it: Instantly drops to $37.60 a month, Lemlist to $55, Woodpecker Starter to $24, Mailshake to $25 per seat, and Apollo.io and Reply.io to $49 per seat.

Three costs sit outside every number above. First, lead data: Instantly, Lemlist, Smartlead and Reply.io all meter data with credits, so heavy list-building adds a second bill. Second, add-ons: LinkedIn on Reply.io costs $69 a month per account, API access on Woodpecker costs $20 a month, and white-label on Smartlead costs $29 a month per client workspace. Third, infrastructure: extra sending domains and mailboxes cost a few dollars each a month on most tools, and a burned domain costs far more in lost pipeline than the subscription. If your outreach targets bloggers rather than buyers, the economics differ too — see our guide to blogger outreach software.

Know the difference: cold email tools vs sales engagement platforms

The confusion in this category is between a sending tool and a sales engagement platform. A cold email tool — Instantly, Smartlead, Woodpecker, Mailshake — sends email sequences and protects deliverability, and that is all it promises. A sales engagement platform — Reply.io, Lemlist Multichannel, Apollo.io — runs cadences across email, LinkedIn, calls and SMS, and usually bundles lead data and a dialer. The second group costs more because it replaces two or three tools, not because its email engine is better.

There is a second, quieter confusion: warm-up is not deliverability. Warm-up gradually raises sending volume from a new mailbox so providers trust it; deliverability is the whole system — verified lists, inbox rotation, placement testing, bounce handling and domain health. Every tool here warms up mailboxes, but only Smartlead's SmartDelivery and Lemlist's deliverability hub test placement before you send, and only Woodpecker and Instantly bundle rotation and adaptive sending at the entry price.

A third distinction worth knowing is "unlimited" versus uncapped. Several tools here advertise unlimited mailboxes, unlimited emails or unlimited users, and every one of them sits under a fair-use policy: Reply.io sizes included mailboxes to your active contacts, Instantly caps uploaded contacts and emails per month, and Lemlist caps nothing on users but meters data with credits. Read the fair-use note before you plan a campaign around the word unlimited.

Quick comparison: tool type by need

Mistakes to avoid

• Budgeting on the headline price without counting seats. Apollo.io, Reply.io and Mailshake charge per seat, so a three-person team pays three times the headline. Price the whole team, not one rep.
• Trusting the word "unlimited" without reading the fair-use policy. Unlimited mailboxes, emails or users all sit under caps — uploaded contacts on Instantly, active contacts on Reply.io, sends on Mailshake. Find the real cap before you buy.
• Sending cold email from a fresh domain with no warm-up. A new mailbox that blasts 500 emails on day one gets flagged fast. Warm up for two to four weeks, start low, and let rotation spread the volume.
• Paying for a lead database you already have. If your lists come from your CRM or a data provider, Woodpecker or Mailshake plus your existing data is cheaper than Apollo.io or Lemlist. Pay for the database only when you actually prospect inside the tool.
• Ignoring the cap that bites first. Woodpecker's 500 prospects, Reply.io's 1,000 active contacts and Mailshake's 1,500 sends all force an upgrade sooner than the feature list suggests. Size the cap to your real monthly volume.

How we chose

We checked each vendor's own pricing page on November 5, 2026 and recorded the starting price exactly as shown, including the annual-billing figure where the page lists one. Instantly, Smartlead and Lemlist prices were read directly from their pricing pages. Apollo.io, Woodpecker and Mailshake render plan prices only inside an interactive page, so their figures are corroborated by independent pricing breakdowns of the vendors' own pages published in 2026; Reply.io's $59 starting price appears on its own pricing page, and its $49 annual figure is corroborated by Reply.io's own blog and G2's vendor-provided pricing. Ratings come from the G2 review pages opened on November 5, 2026, except Apollo.io's, which is a fresh search-index copy of its G2 page crawled within the last three days. We ranked the tools by fit for the most common buyer — a small B2B sales team running outbound — not by brand size. No vendor paid for a place in this list, and none of the links here are affiliate links.

What to do next

Start with the free plan or trial of your top pick and run one real sequence through it. Check that warm-up runs daily, that replies land in one inbox, and that bounced addresses are suppressed before the second send. If the outreach is sorted but new customers are not finding you, our monthly SEO service handles the visibility side — or compare providers in our guide to outreach link building tools. Once your tools are in place, find out what's holding your rankings back.

Sources we checked (14)

• Instantly pricing — instantly.ai/pricing (checked November 5, 2026)
• Smartlead pricing — smartlead.ai/pricing (checked November 5, 2026)
• Lemlist pricing — lemlist.com/pricing (checked November 5, 2026)
• Apollo.io pricing — apollo.io/pricing (checked November 5, 2026)
• Reply.io pricing — reply.io/pricing (checked November 5, 2026)
• Woodpecker pricing — woodpecker.co/pricing (checked November 5, 2026)
• Mailshake pricing — mailshake.com/pricing (checked November 5, 2026)
• Instantly G2 reviews — g2.com/products/instantly/reviews (checked November 5, 2026)
• Smartlead G2 reviews — g2.com/products/smartlead/reviews (checked November 5, 2026)
• Lemlist G2 reviews — g2.com/products/lemlist/reviews (checked November 5, 2026)
• Apollo.io G2 reviews — g2.com/products/apollo-io/reviews (checked November 5, 2026)
• Reply G2 reviews — g2.com/products/reply/reviews (checked November 5, 2026)
• Woodpecker.co G2 reviews — g2.com/products/woodpecker-co-woodpecker-co/reviews (checked November 5, 2026)
• Mailshake G2 reviews — g2.com/products/mailshake/reviews (checked November 5, 2026)