Side by side
FeatureProbe vs TrustyGorilla
Both stand on feature flag software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidAPIiPhone+2
FeatureProbe combines feature controls, rollout management and analysis capabilities in an open-source service. Teams should account for its rollout-key behavior and event tracking requirements when configuring metrics.
Visit FeatureProbe Free plan APISelf-hostedWeb
TrustyGorilla offers feature flags, targeting, experiments, and governance, with a free plan and paid usage beyond its included evaluation allowance. Teams considering Enterprise should confirm pricing and assess whether its private-binary and infrastructure options fit their needs.
Visit TrustyGorillaThe facts
| FeatureProbe | TrustyGorilla | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, API, iPhone, Self-hosted, Web | API, Self-hosted, Web |
| Lowest paid plan | Not published | See the plans |
| Plans published | None | 3 |
| Maker | Not published | Not published |
| Website | featureprobe.github.io | trustygorilla.com |
| On feature flag software | #17 of 27 | #21 of 27 |
FeatureProbe: what it does well
- Supports gradual rollouts and user targeting.
- Can disable problematic services or degrade service operation.
- Portal includes rollbacks, peer reviews and permissions.
- SDKs are listed for multiple server and client languages.
- Apache 2.0 licensed and self-hostable.
What to know first
- Percentage rollouts depend on a stable rollout key.
- Without a rollout key, the SDK uses the current timestamp.
- Custom-event metrics require SDK tracking and matching event names.
TrustyGorilla: what it does well
- Flags can change without redeploying.
- Supports percentage, segment, and attribute targeting.
- Official SDKs cover ten listed languages.
- Free plan includes 1M evaluations per month.
- Governance includes audit trails and approval workflows.
What to know first
- Pay as you go costs $101 a month above free evaluations.
- Free plan is limited to 1M evaluations per month.
Alternatives to FeatureProbe Alternatives to TrustyGorilla The whole list

