Lead FinderSoon
Find verified B2B prospects with precision filters and pre-cleaned contact data. Built for cold email campaigns that actually convert.
New · AI personalization is live
The outreach engine built tohit the inbox.
Cold email software trusted by 279+ growth teams. Automated email warmup, verified lead finder, multi-step campaigns, and a unified inbox — one outreach platform built for inbox deliverability at scale.
4.9 / 5 · Trusted by 279+ growth teams
99%Inbox placement
Warmup active3 inboxes · healthy
Powering outreach at 279+ scaling teams
Stripe
segment
intercom
Dropbox
Framer
Notion
GitHub
slack
Linear
▲ Vercel
Stripe
segment
intercom
Dropbox
Framer
Notion
GitHub
slack
Linear
▲ Vercel
Everything you need
One cold email platform. Every step of outreach.
Stop juggling five tools. Sendlio replaces your lead finder, email warmup, sender, unified inbox, and analytics — one cold email software stack, built to work together from day one.
Email Warmup
Automated email warmup with human-like conversations that build sender reputation and lock in inbox deliverability — no manual work.
Campaigns
Build multi-step cold email sequences with smart delays, A/B variants, and AI-powered reply detection. Every lead runs at their own pace.
Unified Inbox
Every reply from every cold email campaign in one inbox. Full thread context, pipeline statuses, and bulk actions. Respond faster. Book more meetings.
Email VerificationSoon
Real-time email verification that kills bounces before you send. Protects your sender reputation across every cold email campaign.
Analytics Dashboard
Live cold email analytics — sends, opens, clicks, bounces, replies, and meetings booked. Per-campaign, per-step, per-day breakdowns.
01
Connect your inbox in 60 seconds
Integrate Gmail, Outlook, or any SMTP/IMAP provider. Guided onboarding handles DNS, SPF, DKIM, and DMARC for you — no dev work, no deliverability roulette.
02
Build reputation on autopilot
The Sendlio automated email warmup network exchanges human-like conversations to earn inbox trust. Sender reputation climbs, spam placement vanishes, deliverability locks in.
03
Ship multi-step campaigns at scale
Drag-and-drop cold email sequences with smart delays, A/B variants, and AI personalization. Launch multi-step campaigns to thousands of leads in minutes, not days.
04
Every reply in one inbox
Every reply from every campaign in one unified inbox — across every domain and team member. Label, assign, and respond 3× faster than in native mailboxes.
05
See what's working — in real time
Real-time cold email analytics surface open rate, reply rate, bounce rate, and meetings booked. Double down on what's winning. Kill what's not.
Why SendlioTrusted by growth teams.
Trusted by growth teams.
Loved for the results.
Four reasons operators pick Sendlio — and stay.
Built for inbox deliverability
Email warmup, verification, and reputation monitoring — every layer tuned to one outcome: inbox, not spam.
Invisible automation
Drag, drop, launch. Multi-step cold email sequences, smart delays, and auto-replies live in minutes.
Scales with your team
Role-based access, shared inboxes, and unified visibility across 1 to 200 domains. From solo founders to 50-seat SDR teams.
Security you trust
SOC 2 aligned. GDPR ready. AES-256 encryption. Your domains, data, and sender reputation — fully protected.
Proof in every send.
Consistent cold email deliverability at scale. Real customers. Real results.
Start 14-Day Free Trial99%Inbox placement
279+Teams scaling
120K+Emails / mo
4.9/5Customer rating
Real-world impact
Numbers that outperform the market.
Deliverability
99%
Inbox placement across 120K+ monthly sends.
Sendlio cut our manual outreach work by 80%. We went from 2% reply rates to 14% in six weeks — and never hit a spam folder once.
Volume
120K+
Emails sent reliably each month.
Community
279+
Active teams across 25+ countries.
Pipeline
$2M+
New pipeline generated across customer base.
Customer love
What 279+ operators say about Sendlio.
"Sendlio is by far the best outreach tool I have ever used. It's reliable, smart, and saves us hours every week."
"Sendlio is by far the best outreach tool I have ever used. It's reliable, smart, and saves us hours every week."
Sofia Lindstrom
Marketing Consultant
"Since integrating Sendlio, our campaigns have become 10× more efficient. It's smooth, powerful, and doesn't require babysitting."
Luca Moretti
Growth Strategist
"Our agency manages 10+ domains. Sendlio keeps them warm and healthy without lifting a finger. Honestly, it's the best tool we didn't know we needed."
Mateo García
Founder, MailForce
"We stopped worrying about domain reputation after switching to Sendlio. It works in the background and keeps our emails out of spam."
Sam Sen
General Manager
"With Sendlio, cold emails finally reach inboxes — no fluff, no spam. Clean, reliable, and ready for serious senders."
Sarah Sen
Operations Lead
"Sendlio's automation takes care of inbox health so we can focus on outreach. Super easy to use and surprisingly powerful under the hood."
John D'Crouze
B2B Growth Advisor
"Every cold emailer should use Sendlio. It protects your domain, boosts deliverability, and gives confidence with every send."
Niko Tanaka
Sales Director
"Sendlio is by far the best outreach tool I have ever used. It's reliable, smart, and saves us hours every week."
Sofia Lindstrom
Marketing Consultant
"Since integrating Sendlio, our campaigns have become 10× more efficient. It's smooth, powerful, and doesn't require babysitting."
Luca Moretti
Growth Strategist
"Our agency manages 10+ domains. Sendlio keeps them warm and healthy without lifting a finger. Honestly, it's the best tool we didn't know we needed."
Mateo García
Founder, MailForce
"We stopped worrying about domain reputation after switching to Sendlio. It works in the background and keeps our emails out of spam."
Sam Sen
General Manager
"With Sendlio, cold emails finally reach inboxes — no fluff, no spam. Clean, reliable, and ready for serious senders."
Sarah Sen
Operations Lead
"Sendlio's automation takes care of inbox health so we can focus on outreach. Super easy to use and surprisingly powerful under the hood."
John D'Crouze
B2B Growth Advisor
"Every cold emailer should use Sendlio. It protects your domain, boosts deliverability, and gives confidence with every send."
Niko Tanaka
Sales Director
"Sendlio is by far the best outreach tool I have ever used. It's reliable, smart, and saves us hours every week."
Sofia Lindstrom
Marketing Consultant
"Since integrating Sendlio, our campaigns have become 10× more efficient. It's smooth, powerful, and doesn't require babysitting."
Luca Moretti
Growth Strategist
"Our agency manages 10+ domains. Sendlio keeps them warm and healthy without lifting a finger. Honestly, it's the best tool we didn't know we needed."
Mateo García
Founder, MailForce
"We stopped worrying about domain reputation after switching to Sendlio. It works in the background and keeps our emails out of spam."
Sam Sen
General Manager
"With Sendlio, cold emails finally reach inboxes — no fluff, no spam. Clean, reliable, and ready for serious senders."
Sarah Sen
Operations Lead
"Sendlio's automation takes care of inbox health so we can focus on outreach. Super easy to use and surprisingly powerful under the hood."
John D'Crouze
B2B Growth Advisor
"Every cold emailer should use Sendlio. It protects your domain, boosts deliverability, and gives confidence with every send."
Niko Tanaka
Sales Director