HiBob vs Mellow: Performance Reviews Compared

HiBob (Bob) is a modern HRIS aimed at mid-market businesses, with particularly strong performance management and engagement features. Its performance review module supports 360-degree feedback, structured review cycles, and goal tracking. The interface is polished and the employee experience is genuinely good.

Mellow's performance module takes a more compliance-first approach. Performance reviews are logged with documented outcomes. Performance Improvement Plans are tracked through each stage with the evidence needed to support a capability dismissal if the process reaches that point. The ERA 2025 compliance connection — ensuring PIPs do not follow protected leave in a way that looks retaliatory — is built into the workflow prompts.

The pricing model differs too. With Mellow, UK payroll is included in the published Professional tier price — PAYE, NI, RTI, and statutory payments in the same subscription as HR. HiBob runs UK payroll as well, but as a separately-priced module on a quote-only contract, so the all-in cost is harder to pin down up front. Mellow also leans on specialist domain agents — a People Coach and compliance-focused assistants grounded in ERA 2025 — rather than a single general copilot, which suits businesses whose first priority is getting the employment-law detail right. Whether HiBob's stronger engagement features justify its positioning depends on how much of your HR investment you want to direct toward employee experience versus back-end compliance. Both matter — the balance depends on your business.