Hosted in France · GDPR · DPA downloadable online
Disposable inboxes, an API that waits for the message on your behalf, per-inbox quotas from the first paid plan, and an alert before the wall rather than a red CI.
No card required. 500 messages a month, free forever.
// Nothing to provision: any address of the inbox lands.
const inbox = await facteur.inboxes.get('j3k9x2mq');
const address = inbox.address('signup+42');
await page.getByLabel('Email').fill(address);
await page.getByRole('button', { name: 'Sign up' }).click();
// Blocks until it arrives. No sleep, no retry.
const message = await facteur.messages.await({
inbox: inbox.id,
sentTo: address,
timeout: 30_000,
});
// OTP code and links already extracted for you.
expect(message.otp).toBe('265279');
await page.goto(message.links[0].href);What our customers test
The whole signing journey: sending the document to the signer, a reminder on day two, a one-time code to authenticate, a signature receipt to both parties.
6,400 messages a day
The same journey runs in staging and, every five minutes, as a smoke test against production. If the code takes a minute to arrive, the signature fails for a real customer.
Why we exist
We validate electronic signature journeys — sending the document, chasing the signer, the one-time code, the signature receipt. In development first, then replayed continuously as a smoke test against production. Thousands of messages a day, and a latency requirement. These four sentences are the ones we read in our own tool, and each has an answer in the product.
« Daily email limit exceeded. Your quota will reset in around 10 hours. »
One runaway test suite on a Tuesday morning, and the whole team is stopped until the evening. The only way out on offer: raise your subscription.
Buy a capacity pack in two clicks and it is available immediately. Your subscription does not move.
« Upgrade to the Enterprise plan to set custom usage limits per inbox. »
Without isolation, a single misbehaving inbox drains the quota of every other one. The feature exists — it is simply reserved for large contracts.
Per-inbox quotas are included from the first paid plan, at €12 a month. Daily or monthly limits, and you decide whether hitting one blocks or merely alerts.
« Your subscription goes from $166.78 to $247.38 a month. »
Doubling your capacity for a week means committing to the higher tier for the whole month — and waiting for the next cycle to come back down.
Capacity is decoupled from the subscription. Credits last twelve months, they stack, and changing plan never costs you a single one.
« Usage aggregated by date. »
You find out about the overage when CI breaks, and the dashboard will not tell you which inbox caused it.
Alerts at 50, 75, 90 and 100 % by email, webhook, Slack or Teams. Usage broken down per inbox. And your metrics pushed to Datadog, Prometheus or any OTLP collector.
What changes
Prepaid packs you burn at your own pace, pay-as-you-go if you would rather not plan ahead, and a spending cap so you never discover a bill.
See the pricingKeep CI apart from staging, team A apart from team B. Each inbox has its own limit, its own behaviour when exceeded, and its own alerts.
Quotas and alertsA Prometheus endpoint per organisation, an OTLP export, metrics and events in Datadog. And when it really matters, the alert goes to OpsGenie or PagerDuty and wakes the right person, not a shared mailbox.
IntegrationsOVHcloud infrastructure in Roubaix and Gravelines. Sub-processors listed publicly, a DPA you download without talking to sales, encryption at rest and retention you choose.
Our commitmentWhat it comes down to
A QA team receiving 150,000 emails and 750 SMS a month on a dedicated number, with five seats.
186 €/month
123 €/month
Estimated from competitors’ public list prices and from a renewal amount actually observed. The sources, and a simulator for your own volume, are on the pricing page.
Migration
Our API will open a compatibility layer: one base URL and one key to change, with no rewrite. It is not live yet, and the guide says exactly what is.
const mailosaur = new MailosaurClient(
process.env.MAILOSAUR_API_KEY
);const mailosaur = new MailosaurClient(
process.env.FACTEUR_API_KEY,
{ baseUrl: 'https://api.facteur.eu/compat' }
);In the box
Any address at @xxx.inbox.facteur.eu works, with nothing to create first.
The API blocks until the message lands. Your tests no longer contain a single sleep().
OTP codes, links, buttons and images pulled out of the body, ready to assert on.
HTML, text, headers, attachments, .eml export. Nothing is hidden.
Dedicated numbers, SMS reception, code extraction. The same model as email.
Generate the six-digit codes of your 2FA journeys without reaching for a phone.
Replay your critical production journeys from Datadog Synthetics, verification code included.
SAML 2.0 and OIDC, one provider per organisation, with no Enterprise plan in the way.
Account or inbox, read-only or read-write, with expiry and IP restriction.
From 1 to 90 days per inbox, or performance mode which stores nothing at all.
Node, Python, Java, Go and .NET, with Playwright, Cypress and Robot Framework examples.
The free plan asks for no card. If you are migrating from Mailosaur, the compatibility layer saves you from rewriting your tests.