Automate cold outreach with AI, APIs & webhooks
Run high-volume campaigns with full control over logic, timing, and replies.
Use Smartlead’s API to programmatically send campaigns and follow-ups.
Set conditions for replies, pauses, or lead updates without manual input.
Automate complex workflows across multiple inboxes and campaigns.
Let webhooks sync real-time updates across your CRM or reporting tools.
Everything you need to run cold outreach at scale - automatically
APIs that help you automate what matters most.
Trigger cold emails and follow-ups directly from your own backend.
Assign leads, switch sequences, and update campaign status.
Access inboxes, replies, and lead actions to control your workflow.
Balance volume with our email deliverability API layer.
Real-time webhooks for smarter workflows
Stay in Sync With Real-Time Webhooks.
Get notified the moment a lead replies, bounces, or unsubscribes.
Push updates to Slack, CRMs, Google Sheets, or internal dashboards.
Connect your tools and workflows so nothing falls through the cracks.
Replace manual status checks with automated, real-time updates.
Communicate with any CRM or app in the world
Sync leads in real-time via webhooks and the cold email API.
Plug straight into HubSpot, Salesforce, Pipedrive, Zoho, and more.
Use Zapier, Make, or N8N to push or pull data between Smartlead and 6,000+ apps.
Trigger workflows the instant a prospect replies, bounces, or books a call.
Keep every team and client dashboard aligned with one always-up-to-date data stream.
Let’s build your intelligent enterprise outreach engine
Get AI-native operating system for your enterprise sales team
Book a DemoWhat our customers say
Founder, Lambda Group
“The best outbound email marketing software. Customer support - they are so responsive and helpful Features - you can add multiple email domains to the same account.”
Senior Account Executive, Key Outreach
"Intuitive. Game-Changing. POWERFUL. Analytics, spintax, A/B testing, quick personalization. This is a game changer if you send cold email campaign. Grateful to this team for building a product that has changed our day to day. 🚀"
Account Executive, B.I.G. Charity Law Group Professional Corporation
“Hands down the best cold email software. Smartlead is amazing, this is the best tool if you want to cold email at scale and land in the inbox. The team is super responsive with great support. While there is a learning curve to cold email, they really built a great foundation to make it as simple as possible. I am sending over 2k emails a day!!! absolute game changer for my business.”
Co-founder, Pitchlane
“Innovative, reliable, and Suitable For Technical and Non-Technical Users. SmartLead's ability to help me land in the primary inbox and automate the laborious parts of my workflow is brilliant. The customer support is incredibly good, I've had some great feedback on my cold email campaigns.”
Co-Founder, Five Element
“Smartlead is an absolute game-changer! With its exceptional features and support from the Smartlead team, I've experienced remarkable success. The customizable platform and cost-effective pricing have revolutionized our cold emailing game. I would rate it 10 out of 10 for satisfaction. A must-have tool for any B2B agency!”
Sales Director - Financial Institution Solutions Saggezza, Inc.
“Smartlead is an innovative cold email platform that helps me reach out to potential clients. There are easy-to-use templates, powerful automation tools, and intuitive analytics for email warming and campaign analytics. It provides me with everything I need to maximize my cold email campaigns.”
Founder, Leadbird.io
“I've personally built a sales engagement platform similar to Smartlead, and I am genuinely blown away by the scalability, functionality and more. We're a B2B Lead Gen Agency, and we primarily use cold email to generate leads for our clients. We're on track to double our best month in terms of client results.”
CEO, Yell Cut
"I can upload hundreds of email accounts, send thousands of cold emails per day, and still have an organized master inbox. This is unseen with any other tool on the market today. I looked..."
Founder, Office Optim
“Smartlead has been extremely helpful with seamlessly onboarding clients, warming up their accounts, and prepping campaigns to send at high volumes while maintaining high deliverability. There are multiple features that allow me to track performance over time and understand when it is time for me to make adjustments, and Vaibhav is constantly making improvements/upgrades to the platform which gives me all the more faith in the future of this great tool.”
CEO, Rock Solid Lead Generation
“Smartlead is absolutely amazing! The software is easy to understand I am not a techie but directly understand everything and if you really have a question the team always helps instantly. Additionally I love all the features. Like I said for me as a lead generation agency the software gives me everything I need and much more.”
Founder, WindGrowth
“Smartlead is simply amazing. They constantly improve their product and bring new features that make the cold email software even more complete. If you're a big automation enthusiast like me, there are no other cold email tools on the market that allow you to 100% automate your business as Smartlead does.”
Outbound Lead & Partner, Peakora
“Our campaigns weren't just about reaching out, but reaching out right, and Smartlead helped us achieve this. It has added immense value to our business by prioritizing email deliverability and customer needs. I would rate it a 9 out of 10”
Co-Founder, Five Element
“Smartlead is an absolute game-changer! With its exceptional features and support from the Smartlead team, I've experienced remarkable success. The customizable platform and cost-effective pricing have revolutionized our cold emailing game. I would rate it 10 out of 10 for satisfaction. A must-have tool for any B2B agency!”
CEO, Acquisizioneclienti.it
“Best cold outbound email software out there. Everything, is fast, reliable, scalable, you can also white-label, amazing analytics and never breaks like other similar competitors. Never once I went in spam in the last 4 months of using it.”
Owner, Storydriven.video
“I just ended my 2 year search for the right cold emailing platform with Smartlead. A stand alone tool for cold emailing unlike anything else in the market. And it looks like they're only getting started. Now I can finally train my VAs on just one platform instead of bouncing between several like they used to for different things.”
Owner, FunnelVision
“Best cold email tool in the game. Most user friendly cold email tool I've used to date. Super easy to set up, love the bulk upload feature to add multiple domains at once and support is impeccable. They respond so fast it's unreal. Review collected by and hosted on G2.com.”
Powerful automated workflows that drive sales.
Frequently asked questions
What is Smartlead’s API used for in cold email automation?
Smartlead’s API lets you control campaign sends, manage inboxes, update lead statuses, and automate follow-ups—all from your internal systems.
Can agencies use Smartlead API to manage multiple client accounts?
Yes. Agencies can use the API to manage campaigns, leads, and inboxes across unlimited accounts from one centralized system.
Is there documentation available for Smartlead’s API and webhooks?
Yes. You can access full Smartlead API documentation and webhook setup guides from the API Docs page.
How do webhooks work in Smartlead?
Smartlead webhooks notify you in real time when key events happen—like a lead replying, bouncing, or unsubscribing—so you can trigger custom actions instantly.
What kind of workflows can be automated using Smartlead API and webhooks?
You can automate cold email sends, lead routing, follow-up triggers, CRM syncing, reporting, and status updates—ideal for large-scale outreach.