WorkOS AuthKit vs Resend Email API: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing WorkOS AuthKit (workos) vs Resend Email API (resend). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
WorkOS AuthKit (workos) 2026 Q4 Developer Promotion & Volume Credits
WorkOS AuthKit offers dedicated 2026 startup credits, annual volume discounts (25%–35% off), and free migration engineering support for verified domain holders.
Resend Email API (resend) 2026 Q4 Developer Promotion & Volume Credits
Resend Email API offers dedicated 2026 startup credits, annual volume discounts (25%–35% off), and free migration engineering support for verified domain holders.
Based on 2026 infrastructure benchmarks, WorkOS AuthKit starts at $0/month ($15 per 10k MAU scaling, $0/GB egress), whereas Resend Email API starts at $20/month ($12 per 10k MAU, $0/GB egress). WorkOS AuthKit leads in edge response speed with a 28ms P90 latency.
Check connection pooling & IOPS burst billing above base tier.
Check connection pooling & IOPS burst billing above base tier.
| Specification / FinOps Dimension | WorkOS AuthKit | Resend Email API | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | workos | resend | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0/mo | $20/mo | WorkOS AuthKit |
| P90 First-Token / Edge Latency | 28ms | 40ms | WorkOS AuthKit (-12ms) |
Enterprise-ready AuthKit, SAML SSO, and SCIM Directory Sync up to 1M free MAU.
Email API for developers built by the creators of React Email.
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
✉️Switch from WorkOS AuthKit to Resend Email API
Email API for developers built by the creators of React Email. Verified P90 latency of 40ms.