Letterprove on new websites

1. Letterprove appeared on 1 new site in the last 30 days.^[1]

Each bar counts the new sites we found using Letterprove in one week, since 21 September. The chart starts at our first detection. Paler bars cover only part of a week.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Saudi Business Center	<0.1%	28.9%
2	–	Better Business Bureau	<0.1%	13.8%
3	–	Entangle Commerce	<0.1%	5.6%
4	▼2	G2	<0.1%	4.7%
5	–	SociableKIT	<0.1%	3.9%
6	▼1	TrustShop	<0.1%	3.2%
7	▼4	Trustify	<0.1%	2.6%
8	▲5	Plus que PRO	<0.1%	2.5%
9	▼1	Senja	<0.1%	2.3%
10	–	Juicer	<0.1%	1.8%
11	▲5	Provesrc	<0.1%	1.8%
12	▲3	ProveSource	<0.1%	1.7%
…
100	▲8	Letterprove	<0.1%	0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Social Proof tool. Among October launches it ranked #113 in Social Proof, up from #121 in September. All 297 in Social Proof

7 of the 8 sites using Letterprove are product launches we list individually. The other 1 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site	Found	Also detected
⌘+L letter.dev	Nov 12
Letter: Treat Marketing as an Engineering Problem letter.dev · Marketing	Sep 30
Bulwark — Enterprise security posture you can prove — quietly. bulwarkapp.dev · Developer Tools	Aug 29
Cargoline — Verified supply-chain visibility for enterprise shippers cargolineapp.dev · Finance	Aug 27
Wagebase — Provable payroll and people operations for the global enterprise wagebase.dev · Finance	Aug 27
Ledgerly — Corporate cards and spend management you can actually verify ledgerlyapp.dev · Finance	Aug 27
Reachgrid — Outbound performance, independently attested reachgrid.dev · Developer Tools	Aug 27

Watches, exports and the API give you all 8 sites using Letterprove, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.