Auth0 vs Resend
Auth0 and Resend are both developer tools tools. Auth0 is aimed at developers and enterprise, while Resend is aimed at developers. Resend costs less, from $20/mo versus $35/mo for Auth0. Both have a free plan.
| Pricing | Freemium · $35 | Freemium · $20 |
| Starting price | $35/mo | $20/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Enterprise | Developers |
| Platforms | web | web |
| Country | US · 2013 | US · 2023 |
| Rating | — | — |
Choose Auth0 if
Companies with enterprise SSO requirements or large consumer user bases.
- Generous free tier (25k MAU)
- Enterprise SSO and compliance depth
- Reliable at huge scale
Look elsewhere if: Early-stage React apps wanting prebuilt UI (Clerk) or teams wanting self-hosted ownership (Better Auth, Keycloak).
Choose Resend if
Developers and startups who want transactional email that is a pleasure to integrate.
- Best developer experience in email APIs
- React Email templates are a joy
- Free tier for small projects
Look elsewhere if: High-volume senders needing advanced deliverability tooling or full marketing automation.
Auth0 vs Resend pricing
Auth0
- Free$0Up to 25,000 MAU, 1 custom domain, community support
- Essentials$35/moB2C, 500 MAU base; B2B from $150/mo; yearly = 11x monthly
- Professional$240/moB2C, 500 MAU base; B2B from $800/mo; 12 tenants
- EnterpriseCustom99.99% SLA, 30-day log retention
Resend
- Free$03,000 emails/mo, 100/day, 3 domains, 30-day retention
- Pro$20/mo50,000 emails/mo, 10 domains, no daily limit
- Scale$90/mo100,000 emails/mo, 1,000 domains, dedicated IP add-on
- EnterpriseCustom99.99% SLA, dedicated CSM, SSO included
Auth0 · Key features
- Universal Login with social, enterprise and passwordless
- MFA, passkeys and adaptive attack protection
- Organizations for B2B multi-tenant SSO
- Fine-grained authorization and RBAC
- Actions for custom flows and integrations
- SDKs for web, mobile and backend
Cons
- Expensive once beyond free or with enterprise connections
- Complex configuration
- UI customization takes effort
Resend · Key features
- Simple REST API and SDKs for Node, Python, Go, Ruby, PHP, Java
- React Email for component-based templates
- Domains with DKIM/SPF guidance and dedicated IPs
- Webhooks, idempotency keys and batch sending
- Broadcasts for marketing with audiences and unsubscribe
- Logs, analytics and suppression lists
Cons
- Short log retention on lower plans
- Fewer advanced features than SendGrid
- Younger provider; reputation building
Auth0 vs Resend: FAQ
Which is cheaper, Auth0 or Resend?
Resend starts at $20/mo and Auth0 at $35/mo. Both prices are checked on the vendors' own pricing pages.
Do Auth0 and Resend have a free plan?
Yes, both Auth0 and Resend have a free plan; paid plans add more usage and features.