Data import and sync
OneSchema
For a builder who needs repeatable mapping and validation across customer spreadsheets that arrive in different formats.
Tools Library — Page 21
Compare tools for building and running a web app. See what each one does, what it costs, and what you’ll need to set up.
Browse all tools
Showing 481–504 of 778 tools
Notifications and messaging
OneSignal
Use it when people need an update even after they leave your site, such as a pickup order becoming ready.
Uptime and status
OnlineOrNot
Compare it when you want somebody else to run the checks and you need to decide how they connect to a customer-facing status page.
CSS frameworks
Open Props
Consider it when you already write CSS and want shared values while keeping control of each component’s styles.
SaaS starters and templates
Open SaaS
Compare it if you want an open-source starter and are comfortable maintaining a Wasp project alongside a PostgreSQL database.
Agent frameworks
OpenAI Agents SDK
Consider it if your app uses Python and a model needs to propose a tool call that a person can review before it runs.
AI platforms
OpenAI API
Use it when people need a model feature inside your app and you can control its data, cost and fallback.
Coding agents
OpenCode
Consider the terminal workflow if you want a plan before editing and are comfortable reviewing the files and permissions it uses.
Feature flags and experiments
OpenFeature
Consider it if your app should keep the same style of flag checks while you change or test the system behind them.
AI platforms
OpenRouter
Use it when you want to compare or switch model hosts while keeping explicit rules about where each request can go.
Maps and location
openrouteservice
Use it when your app already knows the start and end positions and needs to estimate a route.
Uptime and status
OpenStatus
Compare it when visitors need a clear status page and your team needs to choose which automatic signals and written updates appear there.
Maps and location
OpenStreetMap
Use it as a data source when you can choose separately who draws, hosts and searches the map.
AI evaluation
Opik
It fits when you want to trace one wrong answer back to the search or model step, then add an approved case to repeatable tests.
Forms and surveys
OpnForm
Consider it for an intake form when you want to choose who runs the service behind the link.
Feature flags and experiments
Optimizely Web Experimentation
Consider it when you want to compare a browser-visible change such as a headline or the instructions beside a signup form.
Site and app search
Orama JavaScript library
Consider it if you want to build search into an app you run and choose the data, fields and ranking yourself.
Privacy and consent
Osano
Consider it if your site has several optional services and you need to understand how traffic is counted.
Accessibility
Pa11y
Use it when you want repeatable checks on selected pages and already have somewhere to run a browser test.
Payments
Paddle
Use Paddle when you sell eligible software and want Paddle to be the legal seller for those sales. Check product and website approval before relying on a launch date.
Site and app search
Pagefind
Use it when visitors need to find articles, public help pages or a handbook that your site can produce as HTML files.
Web performance
PageSpeed Insights
For a builder checking a public page who needs to tell a fresh test apart from a history of visitor experiences.
Forms and surveys
Paperform
Consider it when someone needs enough context to make a request and a clear next step after they send it.
Embedded integrations
Paragon
Consider Paragon when customers should configure an integration in your app and the work needs several steps after they connect.