Built for cold emails.
Engineered for deliverability.
Dedicated IPs. Managed reputation. Zero deployments. One API call to send.
Built for the best deliverability, from the ground up.
Lambda Group
You write the emails.
We make sure they land.
Your mailboxes, our infrastructure
Connect Google, Outlook, or SMTP accounts and send through them via API. We verify your DNS configuration is correct, handle OAuth tokens and connection pools, and flag anything that could hurt deliverability before you hit send.
IPs that are actually yours
Dedicated IPs with clean history. Your IPs, your reputation. You never share an IP with another customer. Ever.
Send as fast as the provider allows
No artificial throttling. No shared queues slowing you down. If your mailbox can send it, we send it. Full capacity, immediately.
One API call to send
No SMTP configuration. No header manipulation. No subdomain juggling. Just call the endpoint with your content and we handle the rest.
Zero deployments, ever
No Docker. No Redis. No VPS. No "let me SSH in real quick." Plug in your mailboxes, grab an API key, and you're live. We run the infra.
Schedule and queue sends
Send now or schedule for later. Queue thousands of emails and we deliver them on time, every time. Built-in retry logic included.
Scales with you
100 emails today, 100,000 next month. Nothing to reconfigure. The infrastructure grows with your sending volume.
Same power. None of the ops.
We built the sending infrastructure so you don't have to. Everything under the hood is tuned for deliverability. You just connect your mailboxes, call the API, and send at scale.
Get early accessConnect mailboxes. Grab your API key. Send your first email. That's the whole onboarding.
No servers to provision. No containers to manage. No infrastructure to maintain. Just an API.
Got questions? We've got answers.
Because you'd need to deploy it, keep it running, patch it, scale it, and debug it when something breaks at 2am. We took everything good about that approach (real mailbox connectivity, protocol-level access) and made it something you never have to think about. One API key. That's your entire setup.
The best email infrastructure you'll never have to manage.
If you're tired of configuring SMTP, debugging headers, and babysitting IPs, you're going to love this.