Peanut supports women when it matters most. AppSignal supports Peanut.

Peanut is the app where millions of women find support and connection through fertility, pregnancy, motherhood and menopause. Behind it, the backend team runs a high-traffic Rails API, and AppSignal anchors their weekly engineering retro: a structured review of the past seven days of production error and incident data that shows where engineering time was lost and where reliability work should go next to keep the platform running smoothly for its community.

[In AppSignal]… we can get into the data faster and see where it’s worth spending time optimizing.

Nicolai Dalsgaard, Senior Software Engineer, Peanut

An always-on community needs an always-on platform

Peanut is there for its users when they need support most, from trying to conceive through pregnancy, early parenthood and menopause. That means the platform has to stay available and responsive around the clock.

Peanut’s backend team owns a monolithic Rails API and the infrastructure beneath it. Every Monday they run an engineering retro on the previous seven days of production data: which errors surfaced and how often, which issues took the most time to investigate and resolve, and where targeted reliability work will have the biggest impact on the community.

Moving off Datadog and Sentry

Cost pushed the team to look beyond Datadog and Sentry, and Nicolai started a trial of AppSignal. The team ran AppSignal on its non-Rails hosts on OVH bare metal, connected Slack and PagerDuty for notifications, and sent HAProxy metrics into a custom dashboard so load balancer traffic sits alongside the Rails app. With that in place, they moved their checks and custom metrics over.

Our initial impression is very good, AppSignal is very fast and easy to use.

Nicolai Dalsgaard, Peanut

A roadmap feature, shaped by Peanut

Because the team reviews errors weekly, Nicolai asked for a way to see just the last seven days. AppSignal was already looking at more flexible options for date and time selection for Errors, so Peanut’s feedback went straight into shaping it and AppSignal fast-tracked it for them. The team can now scope the error list to exactly the window under review, so each retro starts from a precise seven-day view of error activity across the application.

Honestly it [the Errors date and time selector] is a gamechanger for us. Really great work, it has made our weekly retros a lot easier.

Nicolai Dalsgaard, Peanut

Figures as of September 2026.