Create a mailbox
Pick a slug; you get support@your-slug.inbound.prosvita.io instantly. No DNS to set up.
Built it the hard way once already?
SES + Lambda + S3 + a custom MIME parser + a retry queue + a dashboard so someone can answer "why didn't my webhook fire?" — and now you maintain all of it. Inbound is that, finished.
Signed
Every payload carries an HMAC-SHA256 signature with replay protection. Receiver samples in four languages.
Retried
Three attempts at t=0, t+1m, t+15m, with jitter. One-click replay from the UI for any delivery, any time.
Debuggable
Every attempt logged with status code, response excerpt, and timing. Find a failed delivery in under 30 seconds.
How it works
From signup to your first webhook in under 90 seconds.
Point a webhook
Paste your URL. Copy the signing secret once. We sign every payload with it on the way out.
Send a test email
The first webhook fires within 8 seconds. The delivery log shows every attempt, status, and response.
What you get
Built for engineers who would rather pay than re-build SES + Lambda + S3.
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Per-mailbox processingTurn parsing knobs (headers, body, links, attachments) on or off per mailbox. Defaults are sensible; overrides are one click. -
Custom payload shapeJSONata transforms remap the payload to whatever your API expects. Iterate in your browser before saving. -
Account-wide or single-mailbox webhooksOne webhook for everything, or one per inbox. Your call. Webhooks scope to what makes sense for your app. -
Spike alertsA five-minute cron watches your delivery success rate and pings you when an integration starts failing. -
Bring your own domainReceive atsupport@yourcompany.cominstead of a subdomain. (Coming with paid plans.) -
Built on Cloudflare's edgeEmail Workers, Queues, D1. Engineered for the cost structure that lets us be honest about pricing.
"SES + Lambda + S3 + a custom MIME parser + a retry queue. Inbound is that, finished." — What this is, in one line
BETA
Free while we're in beta.
Sign up now and lock in an early-bird discount when paid plans launch. No credit card. Cancel any time. Generous limits while we're shaking out the edges.
What free looks like during beta: 1,000 emails / month, 1 mailbox, 1 webhook, 30-day retention. Need more? Email hello@inbound.prosvita.io and we'll lift your cap for the duration of the beta.
Roadmap
An honest look at what's shipping, what's next, and what's further out.
Shipping now
- Email → webhook in < 8s p95
- HMAC-signed payloads + retries
- Per-mailbox processing config
- JSONata payload transforms
- Replayable delivery log
Next
- Multi-member accounts + invite links
- Bring-your-own custom domain
- Per-webhook retry policy + headers
- Stripe billing portal + usage charts
- Aliases per mailbox
Later
- LLM-based extraction (Claude via CF AI Gateway)
- Outbound transactional email
- Attachment virus scanning
- EU data-residency expansion
Frequently asked questions
How fast is delivery?
Median around three seconds. p95 under eight seconds, p99 under thirty. Spikes get absorbed by Cloudflare Queues — your endpoint sees a steady stream rather than a flood.
How do I verify the signature?
Compute HMAC-SHA256(signing_secret, timestamp + "." + body) and compare it (constant-time) against X-Webhook-Signature. Reject if |now - timestamp| > 300s. We ship sample receivers in Node, Python, Ruby, and Go.
What happens when my endpoint is down?
Three attempts at t=0, t+1m, and t+15m, each with jitter. After that the delivery is marked failed and visible in the UI. You can replay any delivery by hand later — original audit trail untouched.
Can I use my own domain?
Yes — coming with paid plans. Add a TXT record and an MX, and we provision routing automatically. While in beta, mailboxes live under the shared *.inbound.prosvita.io namespace.
What gets parsed?
Headers, text body, HTML body, links, attachments (stored in object storage), spam verdict, and message-id. Toggle anything off per mailbox to slim the payload.
What does the free beta include?
1,000 emails per month, 1 mailbox, 1 webhook, 30-day retention. No credit card. Need more during beta? Email us — we'll raise your cap.
Where is my data stored?
Account state in Cloudflare D1 (SQLite at the edge, US by default). Raw .eml files and attachments in Backblaze B2 (us-east-005), with retention enforced per mailbox. EU residency is on the roadmap for paid plans.
Is this open source?
The receiver-side sample code is. The platform itself isn't — yet. We're focused on getting the product to a place where the architecture is stable enough to be useful as a reference.
