Another one (affiliate link) I found, but it is not SOC2 compliant. They have a high price point as compared to others. Worth taking a look at their solution to see if there is enough evidence of good results to justify that kind of pricing.
Here's what I found thanks to Perplexity (contains affiliate links):
Fully Certified (SOC 2 Type II)
AmpleMarket: Maintains a SOC 2 Type II certification, with annual audits and robust third-party penetration testing. Their Trust Portal details the certification and supporting security posture.
Klenty: Explicitly states SOC 2 Type II compliance across multiple sources and details their external audit procedures and internal data safeguards.
Certified (SOC 2 Type I)
Warmly: Has obtained SOC 2 Type I certification. Note this is a lighter attestation (design of controls, not ongoing operation) and does not guarantee continued compliance.