Auth0 or Sendora — pick the trade-off, not the marketing.
Auth0 is a great identity platform. It's also just an identity platform — every downstream use of your user_id (CRM, lifecycle messaging, support, analytics) is a separate vendor with a separate sync. Sendora gives you the same auth surface (OIDC, SAML, SCIM, passkeys, MFA, social, magic link, OTP) and 21 other modules that all share the same user_id natively. Zero CRM-sync glue. One bill.
Identity-as-a-service. Per-MAU pricing. Bolt CRM / analytics / messaging on yourself.
Identity that's already wired to your product analytics, messaging, audiences, and support.
Side-by-side
| Capability | Auth0 | Sendora |
|---|---|---|
| Email / password + magic link + email OTP | ✅ | ✅ |
| Passkeys (WebAuthn) — web + iOS + Android | ✅ (web first) | ✅ native every platform |
| TOTP MFA + recovery codes | ✅ | ✅ |
| Social providers (Google, Apple, GitHub, MS, LinkedIn, FB, Discord) | ✅ | ✅ |
| OIDC SSO (Business+) | ✅ | ✅ |
| SAML 2.0 SSO (Business+) | ✅ | ✅ |
| SCIM 2.0 user / group provisioning | ✅ | ✅ |
| Bulk hash import (bcrypt / scrypt / argon2) | ✅ | ✅ no forced reset on migration |
| Anonymous → identified device-takeover | ❌ (DIY) | ✅ built-in, fires SDK listener + webhook |
| Audience-aware lifecycle messaging on signup | ❌ (sync to Mixpanel + Customer.io) | ✅ same tenant, real-time |
| Support inbox knows the user's auth events | ❌ (Zendesk plugin) | ✅ same timeline |
| Custom JWT claims (Growth+) | ✅ | ✅ |
| Signing key rotation + JWKS history | ✅ | ✅ |
| HttpOnly-cookie SSR (Next.js / Remix / SvelteKit) | Limited | ✅ @sendoracloud/sdk-web-ssr |
| Pricing model | Per-MAU. B2C Essentials ~$700/mo at 10K MAU after overage | Tier-based with 21 other modules included |
Why teams switch to Sendora
- Auth0 B2C Essentials scales to ~$700/mo at 10K MAU; you're also paying separate bills for messaging, analytics, support, audiences. Sendora bundles all 22 modules on one plan.
- Your auth events (`auth.signed_up`, `auth.mfa_enrolled`) are stuck in Auth0 logs. Sendora makes them first-class events that trigger workflows + feed analytics natively.
- Adding lifecycle messaging requires Auth0 → CDP → Customer.io plumbing. Sendora ships Workflow + Email + Push + SMS all reading the same user_id.
- Anon → identified device-takeover (no duplicate push notifications on signin) is built-in. Auth0 leaves you to write it.
When Auth0 is the right call
- You only need identity, never anything else, and you've already absorbed Auth0's MAU pricing.
- You require Auth0-specific features (Rules / Actions ecosystem, Universal Login customisation depth) we don't match.
- Enterprise procurement has already approved Auth0 and switching has zero ROI.
Common questions
What about Auth0's Rules / Actions ecosystem? My identity stack relies on it.
Sendora ships custom JWT claim templates (Growth+) plus webhook handlers for every identity event. Most Rules port to a few lines of webhook handler code. We've helped teams migrate 30+ Rules in under a week.
Does Sendora support enterprise SSO + SCIM?
Yes — OIDC and SAML 2.0 SSO with one-click IdP metadata import, plus SCIM 2.0 user + group provisioning. Both gated to Business+ tier. SPI signing key rotation + JWKS history are standard.
Can I migrate bcrypt password hashes without forcing every user to reset?
Yes. Sendora accepts bcrypt, scrypt, and argon2 hashes natively via the Auth Service bulk-import endpoint (`POST /auth-service/users/bulk-import`). Algo auto-detected from hash prefix (`crypto.ts` line 107-108). Existing users sign in as if nothing changed.
Auth0 has a free tier for 7K MAU. What's Sendora's pricing?
Sendora's Free plan covers 10K events/month (auth + analytics + everything else combined) — no MAU cap. Past that, tiers are based on event volume across all modules, not per-MAU per-module pricing.
What about Auth0 Universal Login's polished UX?
Sendora ships a customizable auth UI surface. Branding + CSS + copy ports via the dashboard. Universal-Login-equivalent UX requires a few hours of design work; identical functional surface.
Authentication
Identity that's already wired to your product — not a black-box you bolt CRM plugins onto.
Auth0 gives you logins. Clerk gives you logins. Sendora gives you logins that already know what the user did in your app, what they consented to, which experiment they're in, which audience they belong to, and how to message them across every channel — because identity, events, profiles, messaging, and support all share one tenant. Auth0 + Mixpanel + Customer.io + Zendesk + Intercom in one bill, one SDK, one user_id.
Switch from Auth0. Keep your weekend.
Free plan covers real product use, no credit card. Bulk hash import for auth, CSV import for profiles, schema-validated event import for analytics — Data Sync module handles the migration in a day.