Skip to content

Welcome to Evidential!

What is it?

A free, open-source experiment engine built by and for nonprofits—putting rigorous, rapid learning in every organisation’s hands.

Why Evidential?

Non-profits are hungry for rigorous evidence, yet most teams lack the technical or financial bandwidth to test ideas quickly. Evidential lets social-sector organisations create, run, and learn from experiments with ease, speed, and no cost.

Who is it for?

Evidential is built for nonprofits that are keen to test and learn. It is ideal when:

  • You’re delivering a digital or hybrid intervention
  • You have visibility into your user journeys, feedback, and behaviour
  • You know what outcomes you care about
  • You have ideas worth testing
  • But you lack the bandwidth, technical or financial, capacity to experiment rigorously on your own

What makes it different?

  • Built for the social sector – our roadmap is steered by a few mission-driven orgs, not by Fortune-500 advertisers
  • Free & open-source – use our managed cloud in minutes or self-host for full control
  • Impact-first metrics – it measures your users’ behaviour change and program outcomes, not vanity clicks
  • Complex multi-source programmes – turn your various data sources into metrics once, then run experiments indefinitely
  • Hands-on support – we guide you through hypothesis design, metric pipelines, launch and analysis, so you focus on learning what works, not on engineering

Key Features

  • Intuitive UI to create and monitor experiments
  • A single dashboard centralizing all your lessons learnt
  • Compatible with both your Data warehouse and Event engines
  • Multiple methods: frequentist A/B, Bayesian, Multi-armed & Contextual bandits
  • Comprehensive API to manage experiments programmatically
  • (Coming soon) Integrations with the main messaging and survey platforms used by nonprofits

What is it not?

Evidential is not a product analytics tool, and it’s not built for full-scale Randomized Control Trials.

If you operate a single web or mobile app and want deep behavioural analytics, tools like Mixpanel or Amplitude are a better fit. These platforms assume a product and engineering team, and a substantial annual budget.

Likewise, if you're planning a one-off RCT with full counterfactuals and enumerator-managed arms, you’ll need a different setup.

Evidential shines when you want to continuously improve your complex program against its current version—10X faster than an RCT, but preserving its rigour.

What kind of ideas can I test out?

Here are some ideas our early partners have tested out:

  • Does the personalized AI response lead to better user engagement?
  • Does using a casual tone with younger users lead to higher completion rates?
  • Does reducing the number of questions asked during onboarding lead to lower drop-off rates?
  • What is the best time to send messages to ensure users engage with it?
  • Will this new feature lead to greater time spent on the platform?

Who are we?

Evidential is a collaboration between IDinsight and the Agency Fund—two teams that heard the same need: make experimentation painless for nonprofits.

We combined complementary approaches into one shared platform (read the blog). Our team includes data scientists, engineers, and product designers with decades of experience building tools for both commercial and social sectors.

Get started

Info

Want to learn more? Email us at support@evidential.dev