Moesif
API analytics and monetization with user-level monitoring and anomaly detection.
Acquired — still operating
Acquired by WSO2 in May 2025 (all-cash); operates as an independent subsidiary under WSO2's API Management Business Unit.
About
Moesif is an API analytics and monetization platform founded by Derric Gilling in San Francisco. It captures API traffic through SDKs and gateway plugins (the SDKs are open source) and analyzes it per user rather than per endpoint: real user monitoring for APIs, anomaly detection that learns what normal behavior looks like, customer health metrics for churn and upsell signals, and usage-based billing metering. Teams use it to debug integrations, monitor third-party API dependencies, and run API products as a business.
In May 2025, WSO2 acquired Moesif in an all-cash deal, and it now operates as an independent subsidiary under WSO2's API Management Business Unit, with the brand and product retained. The acquisition logic is portfolio fit: Moesif's analytics and monetization plug into WSO2's API management stack. AI positioning here is modest (anomaly detection rather than agents), so I score it as analytics with ML features, not an AI-native product.
What it can do
- User-level API analytics and real user monitoring
- ML anomaly detection on API behavior
- Customer health, churn, and upsell metrics
- Usage-based billing metering and quota alerts
- Open-source SDKs and gateway plugins
- Third-party API dependency monitoring
- Dynamic sampling for high-traffic APIs
- Slack and webhook alerting
Setup
- Sign up at moesif.com and create an application to get an application ID.
- Add the open-source Moesif SDK or gateway plugin to your API (Node, Python, Go, Java, and more).
- Configure sampling for high-traffic APIs if needed.
- Build dashboards for usage, errors, and customer health; set alerts and billing meters.
Prerequisites
An API you can instrument with the Moesif SDK or a supported API gateway.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (TIER metrics, metrics-v1). Evidence: acquired by WSO2 May 2025 (all-cash, operates as independent subsidiary); open-source SDKs on GitHub; documented enterprise case studies (Oxolo); long-standing dev.to technical presence. Strengths: user-level analytics model is a real differentiator, now backed by WSO2's global reach. Docked for: (1) AI angle is limited to anomaly detection, not agentic; (2) post-acquisition roadmap now depends on WSO2 priorities. License: proprietary platform, open-source SDKs.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 7.0/10
- Maintenance · recency, releases, issue load
- 7.0/10
- Openness · license + docs
- 7.0/10
- Manual review · sanity read + red-flag check
- 6.0/10
- · API analytics + monetization; founded by Derric Gilling (San Francisco)
- · Open-source SDKs and gateway plugins
- · Acquired by WSO2 May 2025 (all-cash); independent subsidiary under API Management BU
- · Documented enterprise case studies (Oxolo)
- · AI angle limited to anomaly detection; post-acquisition roadmap WSO2-dependent
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.