
Flask
ExpressJS
Django
Yii Framework
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Ruby on Rails
Laravel
FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.

Sentry.io
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We monitor the software that makes your customers happy.
Which is more popular?
Based on our record, FastAPI seems to be a lot more popular than AppSignal. While we know about 313 links to FastAPI, we've tracked only 8 mentions of AppSignal.
Website, pricing, platforms and company facts side by side.
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| Website | fastapi.tiangolo.com | appsignal.com |
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| Platforms | — | |
| Company | Startup from Colombia | Startup from the Netherlands |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of FastAPI yet.
AppSignal gives you error tracking, performance monitoring, host metrics and anomaly detection in one great interface. By developers for developers.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of AppSignal yet.
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FastAPI from the ground up
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using FastAPI and AppSignal. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


When our backend team needs to build services for data parsing, aggregators, or high-load APIs, FastAPI is our absolute go-to choice. It completely lives up to its name-development speed is outstanding. The...
FastAPI, as the name hints, is a swift mover. Built on Starlette, it’s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now that’s something.
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack...
AppSignal had the easiest installation of all the services we tried. Once you sign up, it immediately walks you through onboarding. First you add the :appsignal_phoenix hex package. Then you run mix appsignal.install...
Recommendations tracked on public social media and blogs since March 2021.


API: FastAPI with async SQLAlchemy, PostgreSQL 17 for data, Redis for caching and rate limits. The cache is invalidated by a single version counter bumped on every write: no fine-grained purging to manage. - Source: dev.to / 4 days ago
I used FastAPI, a Python framework built specifically for creating APIs quickly, with automatic validation and interactive documentation baked in. - Source: dev.to / about 2 months ago
The Sovereign SDK is a Python-native framework designed to minimize prose overhead while generating ironclad, cryptographic execution receipts for AI agents, complete with drop-in FastAPI/Starlette ASGI middleware. - Source: dev.to / 4 months ago
It’s pretty obvious, why we should monitor the application’s performance. Application Performance Monitoring (APM) tools are helping us with that. I prefer using New Relic and it has no significant alternatives for me. However, you can... - Source: dev.to / over 2 years ago
Import { test, expect } from "@playwright/test"; // define a test task called "has expected title" Test("has expected title", async ({ page }) => { // visit the AppSignal home page in the browser await... - Source: dev.to / about 3 years ago
Now comes the monitoring part, woo! Monitoring performance indicators in Node.js is very simple. You can opt-in to use the simple internal tools that Node provides, or you can use a fully-fledged tool like AppSignal. - Source: dev.to / over 3 years ago
When comparing FastAPI and AppSignal, you can also consider the following products.

a microframework for Python based on Werkzeug, Jinja 2 and good intentions.
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From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
Compare Sentry.io to FastAPI or AppSignal:

Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Compare ExpressJS to FastAPI or AppSignal:

New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.
Compare NewRelic to FastAPI or AppSignal:


Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
Compare AppDynamics to FastAPI or AppSignal: