Frequently asked questions

Sestaro is a B2B professional contact database. You search and filter for free, then spend one sestaro to unlock a contact's email.

Sales teams, recruiters, marketers and agencies who need targeted professional contacts for their outreach.

You do not pay for a frozen batch: you search, filter and only spend a sestaro on the contacts you choose to unlock. Exports are de-duplicated and the same contact is never charged twice.

You sign up with your email, confirm your address, and immediately receive 100 sestaros: a 25-sestaro welcome bonus plus your first monthly quota of 75. No credit card is required.

No. The account, the 100 starting sestaros and the 75 sestaros refilled every month cost nothing, with no credit card and no commitment. You only pay if you choose to buy more sestaros.

Search, every filter and the record preview are free and unlimited. You only spend a sestaro when you unlock an email.

Sestaro is a web application: it works in any modern browser, on desktop and mobile, with nothing to install.

Yes. The interface, emails and documents are available in French and English, and you can switch language at any time from the site header.

The sestaro is the platform's currency: 1 sestaro = 1 unlocked contact, with their email.

Search, filters and previews are free. Unlocking a contact's email costs one sestaro, and enriching a file costs one sestaro per enriched contact.

No. The sestaros you buy never expire and stay available on your account for as long as you need them.

You buy one-time sestaro packs, or you subscribe to a plan. Details and quantities are on the pricing page.

The price depends on the pack or plan you choose: the larger the volume, the lower the unit cost. See the pricing page for current details.

No. You only spend a sestaro when an email is actually unlocked. A record without an email costs nothing.

On paid plans, if our mailbox check proves that an unlocked email is dead, the sestaro you spent is automatically refunded, and the record is removed from the database so nobody pays for it after you. We never charge for an invalid address: that is our transparency commitment. The free account does not include this real-time check, so it does not include the refund either.

Never. A contact you have already unlocked stays accessible and re-downloadable for free, without spending another sestaro.

They are B2B professional records sourced from public and professional sources, across many countries.

More than 83,862,416 professional contacts across 147 countries. The index grows regularly with new countries and new records.

A record gathers name, job title, company, industry, company size, country and region, a professional email when available and, in some cases, a LinkedIn profile.

Yes, as a waterfall. Every email first goes through an in-house check included everywhere, free account included: syntax, domain (MX record), and a filter for disposable, generic and role addresses. Paid plans add a real-time mailbox check at unlock time: we ask the recipient mail server whether the mailbox actually exists. Three possible verdicts, shown on the record: safe (mailbox proven reachable), risky (the server accepts everything, impossible to decide), dead (your sestaro is refunded and the record leaves the database). The free account stops at the standard check.

Each email shows a status: valid domain, domain without a mail server, disposable address, role address or invalid syntax. You know how reliable an address is before you act.

Data is not guaranteed in real time: datasets have varying collection dates depending on the country. We favour transparency and show reliability signals rather than a promise we could not keep.

The index grows regularly, with new countries and new records added. The counter shown at the top of this page reflects the current volume.

Each record shows a score based on its completeness and reliability signals. You can spot the most usable contacts at a glance before spending a sestaro.

Sestaro focuses on verifiable professional emails. Other qualification signals, such as job title, company, industry and LinkedIn profile when available, are also on the record.

Yes. Your exports are de-duplicated: the same contact is never delivered twice in the same file, nor charged again.

Sestaro is self-hosted on our own servers located in Europe (Germany). Your data is not resold to third-party platforms.

You enter keywords and refine with filters. Results appear with the email masked and the quality score, ready to be unlocked.

You combine firmographic filters: job title, industry, country, region, company size and more, to target your contacts precisely.

Yes. You can work by accounts: search for a company and find the contacts attached to it, then organise them into lists.

Yes. Each result shows the job title, company and quality score, with the email masked. You only spend a sestaro if you choose to reveal it.

No. Search and filters are unlimited and free, whatever your sestaro balance.

Broaden your criteria: drop an overly narrow filter, add nearby countries or industries. Combinations that are too tight sharply reduce results.

Yes. You can stack several values on the same facet to cover multiple countries, industries or company sizes in a single search.

From the results, you click unlock: one sestaro is spent and the verified email appears, added to your history.

Yes. You select several records in the results and unlock them in a single action. The cost stays one sestaro per contact actually unlocked.

A history keeps every record you have unlocked. You can browse, search and re-export them at any time.

Yes, for free. An unlocked contact can be re-downloaded as many times as needed, without spending another sestaro.

You group your contacts and accounts into named lists, which you reuse for your exports and campaigns.

You export a list or your history as CSV, ready to import into your CRM or email tool.

List exports are in CSV, and each contact can also be downloaded individually as a vCard.

Yes. The same contact never appears twice in an export, even if it is in several lists or searches.

A persona is a saved search with all its filters. You replay it in one click without reconfiguring your criteria.

You enable alerts on a persona: Sestaro emails you when new contacts matching that persona appear in the database.

Alerts are evaluated daily and you only receive an email when there are actually new contacts to report.

Yes, at any time. Each persona has an alert switch you turn on or off without losing the saved search.

Yes. You upload a CSV file, we match it against our database and enrich it with the available information.

Matching relies first on the LinkedIn profile, then on the email, then on the name and company pair, to find the right record.

Enrichment is charged per sestaro, only on contacts that were actually enriched. Lines with no match cost nothing.

You upload a CSV file, then map your columns to the expected fields before running the enrichment.

Yes. A REST API lets you embed contact search and unlocking directly into your own tools.

You generate your tokens from your account area. Each call authenticates with that token, which you can revoke at any time.

Yes. Unlocks through the API are capped per day and per account, to protect the database against mass extraction.

The MCP server exposes Sestaro's search and unlocking as tools usable by AI agents, for example from a compatible assistant.

Yes. Webhooks push your unlocked contacts to your CRM in real time, as soon as an unlock happens.

Yes. Each delivery is signed (HMAC): your system verifies the signature to make sure the data really comes from Sestaro.

Yes, through webhooks: you plug the stream of unlocked contacts into Zapier to route it to thousands of apps.

Yes. Processing of B2B data relies on the legitimate interest of prospecting, with rights and safeguards for the individuals concerned.

The legitimate interest of B2B prospecting. We only process professional data, not private-life data.

An opt-out form lets a contact be taken out. We then keep an encrypted fingerprint of their email only, to stop them from reappearing when the data is refreshed.

Anyone can request access to their data or its erasure. We handle these requests (DSAR) and take the record out of the index and of the relevant customer unlocks.

We apply a defined retention policy, detailed on our dedicated data retention page.

Yes. A data processing agreement is available on the site to frame our relationship as controllers and processors.

No. Sestaro uses no advertising tracker: only a session cookie strictly necessary for the site to work is set.

You remain responsible for your campaigns and for complying with the rules applicable in your country. We encourage you to target precisely and to honour any unsubscribe request.

Payments are securely processed by Stripe, by card. Sestaro never stores your card details.

Both. You buy one-time sestaro packs, or take a subscription if you use Sestaro regularly. Details are on the pricing page.

A management portal lets you change your payment method, download your invoices and cancel your subscription at any time.

Yes. An upgrade applies immediately on a prorated basis, and a downgrade takes effect at the end of your current cycle.

Yes. Each payment generates a numbered PDF invoice, available in your billing area.

Yes. The VAT regime is computed from your billing profile, with live validation of your EU VAT number through VIES.

A refund remains possible. Reach us from your account area with your request, and we will review it case by case.

If a subscription payment fails, you receive an email with a link to the portal to fix your payment method.

Yes, when you have one. The promotion code field appears at checkout.

You enable app-based two-factor authentication (2FA), with backup codes to keep offline so you never lose access.

Yes. You can view the list of your active sessions and log out remotely from one device, or everywhere in a single action.

Everything is set from your account area: password, email address, interface language and billing profile.

Sign-up is protected by an anti-bot check and by disposable-address filtering, to keep the platform clean.

You close your account from your account area: your personal data is erased, under the right to erasure.

You reach us from your account area for any question about your account, your sestaros or your data. We reply directly.

We do our best to reply as fast as possible. Include your request and its context in your message to speed things up.