Italian online legally valid communications service: sends certified PEC email, electronic registered mail, digital signatures, paper registered letters, telegrams and cancellation letters, paid per use.
In Italy, sendiOne-line growth story, compiled by us from public sources; speculation is marked separately below.
Checkout: checkout.stripe.com
“Registrati gratis; Ogni servizio ha il proprio prezzo indicato nel listino; 696.286 registered users”Quote from the site
New-user source: SEO (Non-brand search). Search 46.7%, direct 40%, paid 8%; brand keywords 68%, non-brand keywords include pec gratuita and superpec. Referrals come from the Italian social security agency inps.it 5.77%, chefirma.it 3.9%, libero.it 3.64%; claims 696K registered users, who come back when they need to send a letter.
Top channel measured by Similarweb, others estimated by rank
| Attributable new users, last month | Share |
|---|---|
| SEO | 19% |
| Other | 81% |
Direct + brand search 68%. Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
| Country | Share of visits |
|---|---|
| Italy | 94.84% |
| United States | 1.22% |
| Germany | 1.02% |
| United Kingdom | 0.71% |
| Spain | 0.6% |
Italian
YouTube
4.1K keywords · brand ~68% · organic 77.23% / paid 22.77%
| Similarweb top 5 keywords |
|---|
| lettera senza busta |
| letterasenzabusta |
| superpec |
| lettera senza busta pec |
| pec gratuita |
Non-brand queries: superpec, pec gratuita
6 referring sites
| Site | Share of referrals |
|---|---|
| inps.it | 5.77% |
| chefirma.it | 3.9% |
| libero.it | 3.64% |
| Category | Share of referrals |
|---|---|
| Computers Electronics and Technology - Other | 42.47% |
| Financial Planning and Management | 41.26% |
About 25,788 last month (Similarweb estimate), #109 of 606; the month before was 18,227. Opening checkout is not paying, so this is not revenue.
New-user source: SEO (Non-brand search). New users mostly come from need-based searches Search 46.7%, direct 40%, paid 8%; brand keywords 68%, non-brand keywords include pec gratuita and superpec. Referrals come from the Italian social security agency inps.it 5.77%, chefirma.it 3.9%, libero.it 3.64%; claims 696K registered users, who come back when they need to send a letter.
Free sign-up, no subscription, each service charged per use (price list not public on the page)
Dossier confidence: medium. Parts 1 and 2 come from reading the site and Similarweb data; part 3 from public reporting, founder posts, Wayback snapshots, WHOIS and similar, with speculation marked.
The number: checkout visits is Similarweb's estimate of visits from the site to a checkout payment page; opening checkout is not paying, so this is not revenue. Small sites land on fixed buckets.
Data through last month. Page updated 2026-10-26.
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