Svix or Sendora — pick the trade-off, not the marketing.
Svix is the standard for webhook delivery — exponential backoff, retries, replay, signed payloads, dashboard. Customers ship product events INTO Svix. Sendora bundles webhook delivery into every module's event stream natively. Same HMAC-SHA256 signing scheme, same exponential backoff (2s/8s/30s/90s), same replay tooling — no Svix subscription required.
Best-in-class webhook delivery infrastructure. You ship product events into Svix, Svix delivers.
Svix-grade webhook delivery built into the platform — across every Sendora module's event taxonomy, no separate vendor.
Side-by-side
| Capability | Svix | Sendora |
|---|---|---|
| HMAC-SHA256 signed deliveries | ✅ | ✅ Stripe convention |
| Exponential backoff + retries | ✅ | ✅ 2s/8s/30s/90s |
| Replay + delivery log | ✅ | ✅ |
| Per-endpoint event filters | ✅ | ✅ |
| Inbound webhook validator | Limited | ✅ + SSRF guard |
| Built-in event taxonomy for every product event | ❌ (DIY emit) | ✅ 50+ canonical types |
| Pricing model | Per-event tier | Bundle, no per-event markup |
Why teams switch to Sendora
- Svix Pro is $490/mo for the delivery infra ALONE — you still ship product events into it. Sendora bundles both: the source taxonomy AND the delivery posture.
- Inbound endpoints with SSRF guard + replay-window guard included — accept Stripe / GitHub / Slack callbacks without a separate validator service.
- Rotating signing secret with two-active overlap — no webhook outage during key rotation.
- Same dashboard surface for outbound + inbound — Stripe / Svix posture parity end-to-end.
When Svix is the right call
- You operate a non-Sendora SaaS that needs webhook infrastructure for YOUR product's events — Svix is the right answer there.
- You need Svix-specific features (multi-tenant SaaS reseller mode, customer-facing webhook dashboards branded for your customers) we don't replicate.
- You're sending 10M+ webhook deliveries/mo — Sendora's delivery scale is targeted at SaaS app event volumes, not at-scale notification fan-out.
Common questions
Does Sendora ship Svix-grade signing + retry?
Yes. HMAC-SHA256 with Stripe convention header (`t=…,v1=…`), exponential backoff (2s/8s/30s/90s), per-endpoint event filters, replay on demand, delivery log with full payload + headers + response body.
Can I use Sendora webhooks for events outside the Sendora taxonomy?
No — Sendora's webhook surface is built for the 50+ canonical Sendora events. For arbitrary event delivery from your own system, keep Svix or a similar dedicated tool.
Cost comparison?
Svix Pro starts at $490/mo. Sendora bundles webhook delivery into every paid plan with no per-event markup. If webhook delivery is the only thing you need from Sendora, the math doesn't work; if you'd be on Sendora anyway, the marginal Svix bill is zero.
What about inbound webhooks?
Sendora ships an inbound endpoint validator with replay guard + SSRF guard (blocks RFC1918, loopback, link-local, cloud-metadata, CGN ranges). Same shape as Svix.
Webhooks
One signed subscription to the whole platform's event taxonomy — Stripe / Svix delivery posture, zero per-event bill.
Svix Pro is $490/mo for the delivery infra alone; you still ship product events into it. Hookdeck Mid is ~$200/mo. Sendora bundles the same delivery posture (HMAC-SHA256 signed, exponential-backoff retry, replay, delivery log, SSRF-guarded inbound) into every module's event stream natively. One webhook endpoint subscription captures `auth.user_created`, `auth.device_takeover`, `push.token_invalidated`, `email.bounced`, `support.ticket_created`, `csat.detractor`, `billing.subscription_updated`, `automation.run_completed`, `attribution.install_attributed`, and 40+ more — one signed payload format, one rotating secret, one delivery log. The "integrate this" step in every SaaS evaluation, already done.
Switch from Svix. 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.