Email delivery
that doesn't suck.
Send transactional email with one line of code. Transparent pricing, enterprise-grade deliverability, and the developer experience you've been waiting for.
No credit card1,000 free emails/monthSet up in < 2 min
Email DashboardLive
live dashboard preview
Email delivery shouldn't be this hard
Legacy providers were built for a different era. Here's the gap — and how we close it.
Traditional Email APIs
The old way
- Complex SDKs with boilerplateHundreds of lines just to send a simple email
- Hidden overage & surprise bills10x charges when you exceed your 'unlimited' plan
- Noisy-neighbor performanceYour delivery speed depends on who else is on the server
- Dashboards stuck in 2012Outdated UI with 30-minute data delays
- Enterprise features lockedPremium features hidden behind enterprise contracts
InboxFlow
The modern way
- One-line APIA single curl or SDK call. That's it.
- Transparent pricingWhat we quote is what you pay. No overage. Ever.
- 50K+ connections per nodeDedicated throughput with full isolation
- Real-time analyticsLive dashboard with sub-second data refresh
- All features, every tierNo feature gates. No enterprise contracts needed.
Trusted by engineering teams
Everything you need to ship at scale
No feature gates, no enterprise upsells, no hidden limitations. Every tool included at every tier.
One-Line API
From zero to sending in 5 minutesA single curl command and you're sending. Our SDKs for Node, Python, Go, Rust, and PHP make integration a 5-minute job.
Edge Performance
<1ms average processing timeRust + Cloudflare Workers gives us sub-millisecond processing with 50K+ concurrent connections per node.
AI Deliverability
99.99% delivery rate guaranteeML models predict inbox placement before you hit send. Automatic IP warmup, bounce classification, and suppression management.
Real-Time Analytics
Sub-second data refreshLive dashboards with sub-second refresh. Track opens, clicks, bounces, and delivery timelines — with instant webhook alerts.
Template Studio
Build emails visuallyVisual drag-and-drop editor with full Handlebars and MJML support. Version-controlled templates with team collaboration.
No Overage Billing
Transparent pricing, alwaysWhat you see is what you pay. No surprise bills, no hidden fees, and no 'unlimited' that caps out after 10K emails.
Enterprise Security
SOC 2, SSO, RBAC includedSSO/SAML, RBAC, audit logs, SOC 2 compliance. Built from day one — not bolted on after an acquisition.
All features, one price
No per-feature add-ons. No enterprise sales calls for basic features.
From zero to sending in minutes
No complex setup. No conference calls. Just email infrastructure that works.
Sign up free
Create your account in under 30 seconds. No credit card, no sales call, no commitment.
Grab your API key
Your API key is generated instantly. One curl command, and you're sending emails.
Verify your domain
Our guided wizard walks you through DKIM, SPF, and DMARC setup in 2 minutes.
Ship with confidence
Real-time analytics, smart deliverability, and transparent billing — all out of the box.
Sign up free
Create your account in under 30 seconds. No credit card, no sales call, no commitment.
Grab your API key
Your API key is generated instantly. One curl command, and you're sending emails.
Verify your domain
Our guided wizard walks you through DKIM, SPF, and DMARC setup in 2 minutes.
Ship with confidence
Real-time analytics, smart deliverability, and transparent billing — all out of the box.
Loved by developers
See what teams are saying about InboxFlow.
“We switched from SendGrid and cut our email infrastructure costs by 70% — plus the API is genuinely a joy to use.”
“The deliverability analytics alone are worth the switch. We caught a domain warmup issue before it became a problem.”
“One-line sending isn't just marketing. It's actually one line. Our onboarding went from hours to minutes.”
Simple, transparent pricing
All features included at every tier. No overage, no hidden fees, no "contact sales."
Free
Perfect for side projects
1,000 emails/mo
- API & SMTP access
- Open & click tracking
- 5 email templates
- 1 custom domain
- Community support
- 7-day analytics retention
Hacker
Best value for growing apps
Up to 100K/mo
- Everything in Free
- 50 email templates
- 3 custom domains
- 3 team members
- 10 API keys
- Email support (4hr)
- 30-day analytics retention
Startup
For production-scale apps
Up to 1M/mo
- Everything in Hacker
- 200 email templates
- 10 custom domains
- 10 team members
- 50 API keys
- Chat support (1hr)
- 90-day analytics retention
- 99.9% uptime SLA
Got questions?
Everything you need to know about InboxFlow.
How is InboxFlow different from SendGrid?
Do I need a credit card to start?
What happens if I exceed my plan's limits?
Can I use my own sending domain?
What kind of support do you offer?
Is enterprise pricing really visible?
Start sending in under 2 minutes
No credit card. No onboarding call. No "talk to sales." Just one API key and you're shipping.