KYC Automation for Small/Mid-Sized Trading Platforms

Curious if anyone has experience or recommendations for scalable, cost-effective KYC automation solutions particularly for smaller to mid-sized trading platforms. We're grappling with the balance between robust compliance and operational overhead as user volumes tick up. The big-name enterprise solutions feel like overkill, but manual review is becoming a bottleneck.

Specifically, what are the common pitfalls to watch out for when integrating these tools? Are there any hidden costs beyond the per-check fee that surprised you? I'm thinking about things like ongoing maintenance, false positives needing manual override, or integration complexity with existing backend systems. Any practical advice or vendor names (even just categories of vendors) would be greatly appreciated.