Simple, transparent pricing
No overage billing. No hidden fees. All features included at every tier.
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
Business
For high-volume teams
Up to 10M/mo
Show 2 more features
Enterprise
For mission-critical infrastructure
Unlimited
Show 3 more features
Feature comparison
Every feature included at every tier. No surprises, no gating.
| Feature | Free | HackerPopular | Startup | Business | Enterprise |
|---|---|---|---|---|---|
| API Access | |||||
| SMTP Relay | |||||
| Open Tracking | |||||
| Click Tracking | |||||
| Webhooks | |||||
| Templates | 5 | 50 | 200 | 1,000 | Unlimited |
| Sending Domains | 1 | 3 | 10 | 50 | Unlimited |
| Team Members | 1 | 3 | 10 | 25 | Unlimited |
| API Keys | 2 | 10 | 50 | 100 | Unlimited |
| Support | Community | Email 4hr | Email 2hr | Chat 1hr | Slack 15min |
| Analytics Retention | 7 days | 30 days | 90 days | 1 year | Custom |
| Dedicated IPs | — | — | $50/mo | Included | Included |
| SSO/SAML | — | — | — | $100/mo | Included |
| Audit Logs | — | — | — | 90 days | 7 years |
| Sub-accounts | — | — | — | 10 | Unlimited |
| SLA | None | None | 99.9% | 99.99% | 99.99%+ |
| Data Residency | US only | US/EU | US/EU | US/EU/APAC | Any |
Got questions?
Everything you need to know about InboxFlow pricing.
How is InboxFlow different from SendGrid?
We don't do overage billing. You pay for what you use, and we never surprise you with a bill. Plus, our infrastructure built on Rust + Cloudflare gives us 60-80% cost savings that we pass on to you.
Do I need a credit card to start?
Nope. Our Free tier includes 1,000 emails/month with no credit card required. Upgrade only when you need more volume.
What happens if I exceed my plan's limits?
We'll notify you before you hit your limit. You can upgrade instantly — no prorating games, just a simple switch. We never auto-charge you for overage.
Can I use my own sending domain?
Absolutely. We provide a guided setup for DKIM, SPF, and DMARC records. Our domain verification wizard makes it a 2-minute process.
What kind of support do you offer?
Community support for all tiers. Email support starting at Hacker (4hr response), chat at Startup (1hr), and dedicated Slack at Enterprise (15min).
Is enterprise pricing really visible?
Yes. Enterprise starts at $2.50/100K with custom volume pricing. You can see pricing in your dashboard — no "contact sales" walls.
Start sending in under 2 minutes
No credit card. No onboarding call. No "talk to sales." Just one API key and you're shipping.