The most prominent spam filtering companies ranked by global prominence, funding activity, and market position.
| # | Company | Location | Employees | Total Funding | Last Round | Last Funded |
|---|---|---|---|---|---|---|
| 1 |
IPXO
IP Management / Abuse Management / DNS Management / Delegated RPKI / IP Reputati…
|
London | 51 - 100 | $2.5M | Undisclosed | 2025-10-20 |
| 2 |
Respondology
Respondology develops a customizable comment moderation tool for businesses or a…
|
Boulder | 11 - 50 | $16.0M | Series A | 2025-04-23 |
| 3 |
Two Hat Security
Two Hat is the world's leading AI-powered content moderation platform for organi…
|
Kelowna | 51 - 100 | $9.9M | Series A | 2019-11-12 |
| 4 |
Arkose Labs
Arkose Labs protects enterprises from cybercrime and abuse.
|
San Mateo | 101 - 250 | $106.5M | Series C | 2021-05-11 |
| 5 |
Smart Moderation
Smart Moderation is an AI solution that keeps the online world clean and free fr…
|
San Francisco | 1 - 10 | $240K | Seed | 2016-09-01 |
| 6 |
Smyte
Smyte stops bad actors on marketplaces and social networks.
|
San Francisco | 11 - 50 | $6.2M | Series A | 2017-03-28 |
| 7 |
SF Filter AG
SF Filter AG distributes mobile and industrial filters used for oil, air, fuel, …
|
Bachenbulach, Switzerland | 101 - 250 | — | Private Equity | 2016-01-01 |
| 8 |
Keypic
Keypic is a cyber security and authentication tool combats web-spam without CAPT…
|
Walnut, United States | 11 - 50 | — | Seed | 2013-10-25 |
| 9 |
IID
IID's ActiveTrust accelerates big collaboration for actionable security intellig…
|
Tacoma | 51 - 100 | $8.0M | Series A | 2013-11-05 |
| 10 |
ClearMyMail
ClearMyMail provides online spam filtration services to protect emails from spam…
|
Corby | 1 - 10 | $150K | Angel | 2007-12-01 |