SuprSend
Notification workflow API with preferences, batching, and multi-tenant options.
SuprSend is a multi-channel notification platform for email, SMS, WhatsApp, push, Slack, Teams, webhooks, and in-app notifications. It has a broad workflow feature set, including preferences, batching, digests, data modeling, and enterprise multi-tenant controls.
An agent stack treats email as a two-way primitive. Inbound has to arrive as structured JSON a tool call can consume, sends have to be safe to retry when a model loop repeats itself, and every action needs an audit trail. A provider without inbound parsing only solves half the problem.
Against inbound parsing into tool calls and model-generated sends that must not duplicate, SuprSend covers webhook coverage, event stream, batch sending, SDK breadth, and multi-tenant support, and does not cover inbound parsing and idempotency keys. Whether that gap matters depends on how central those are to the build.
- Inbound parsing: No
- Idempotency keys: No
- Webhooks: Yes
- Operating since: Not published
- Event stream: Yes
- Best published rate per 1,000: Tiers not published in comparable form
- Batch sending: Yes
- SDKs: node, python, go
- Multi-tenant: Yes
Depends on the downstream delivery providers connected for each channel.
Teams that need notification workflows, preferences, and batching without starting at a $249+ paid plan.
Teams that only need a simple in-app inbox.
- › Free plan includes 10,000 notifications
- › Essentials starts lower than Knock, Courier, MagicBell, and Engagespot paid entry plans
- › Strong preference, batching, digest, and data-modeling surface area
- › Enterprise plan lists multi-tenant data modeling and bring-your-own-cloud options
- › Notification counting can still become expensive at multi-channel scale
- › Advanced preferences, objects, and tenant controls sit on higher plans or add-ons
- › Requires downstream providers for email and SMS delivery costs
Features at a glance
| API | Yes |
| SMTP | No |
| SDKs | node, python, go |
| Webhooks | Yes |
| Templates | rich |
| React Email | No |
| Batch send | Yes |
| Scheduled send | Yes |
| Suppressions | Yes |
| Multi-tenant | Yes |
| Inbound parsing | No |
| Event stream | Yes |
| Idempotency keys | No |
| Dedicated IP | No |