At a Glance
| Detail | PHI Mask | Thirdfort |
|---|---|---|
| Category | Compliance & Privacy | Compliance & Privacy |
| Total raised | Not disclosed | $23.6M |
| Rounds tracked | Not disclosed | 4 |
| Latest round | Not disclosed | Series A, $19.7M · Mar 2022 |
| Last valuation | Not disclosed | Not disclosed |
| Lead investors | Not disclosed | Breega, Alex Chesterman |
| Built for | Not disclosed | Not disclosed |
| Headquarters | Not disclosed | United Kingdom |
Funding, Side by Side
PHI Mask rounds
No public rounds tracked yet.
Thirdfort rounds
- Mar 2022Series A$19.7M
- Apr 2021Undisclosed$2.1M
- Aug 2020Seed-plus$1.3M
- Oct 2018Pre-Seed$522K
Our Take
We have not tested these two head to head yet. The numbers above come from public funding announcements. If you use either one, tell us what you found and it may become a Field Note.
Quick Answers
- Which has raised more, PHI Mask or Thirdfort?
- Thirdfort has raised $23.6M in disclosed funding, compared with no disclosed amount for PHI Mask.
- What is PHI Mask best for?
- PHI Mask is a browser-based tool that detects and reversibly masks personal and health identifiers in pasted text, screenshots, and PDF files.
- What is Thirdfort best for?
- Client ID and AML checks for law firms.
Source: Legal Tech Circle funding data, from public announcements. Updated November 12, 2026.