Software Alternatives, Accelerators & Startups

Retool VS FastAPI

Compare Retool VS FastAPI and see what are their differences

Retool logo Retool

Build custom internal tools in minutes.

FastAPI logo FastAPI

FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.
  • Retool Landing page
    Landing page //
    2023-08-04
  • FastAPI Landing page
    Landing page //
    2023-05-14

Retool

Website
retool.com
$ Details
freemium $10.0 / Monthly (Startup)
Release Date
2017 January
Startup details
Country
United States
State
California
Founder(s)
David Hsu
Employees
10 - 19

FastAPI

Pricing URL
-
$ Details
free
Release Date
-
Startup details
Country
Colombia

Retool features and specs

  • Speed of Development
    Retool allows developers to rapidly build internal tools with a drag-and-drop interface, reducing the time it takes to get functional applications up and running.
  • Integration Capabilities
    Retool supports integration with a wide range of databases, APIs, and other services, making it easier to connect different data sources and systems.
  • Customizability
    While Retool provides prebuilt components, it also allows for custom code and scripting, enabling developers to tailor applications to specific requirements.
  • Collaboration Features
    Retool supports collaborative features, such as sharing applications with team members and version control, making it easier to work in teams.
  • Security
    Retool provides robust security features, including access control and data encryption, to help protect sensitive information.

Possible disadvantages of Retool

  • Cost
    Retool can be relatively expensive compared to building internal tools from scratch or using some other platforms, potentially making it less accessible for smaller teams or startups.
  • Learning Curve
    Despite its user-friendly interface, there can be a learning curve for new users who need to become familiar with its specific functionalities and scripting capabilities.
  • Customization Limitations
    Though Retool offers customizability, there might be certain limitations compared to fully bespoke solutions, impacting highly specific or complex use cases.
  • Dependency on Retool
    Relying heavily on Retool may create a dependency that could be problematic if the company changes its pricing, features, or discontinues services.
  • Performance
    For very large datasets or highly complex operations, performance can become an issue, as it is with many platform-based solutions.

FastAPI features and specs

  • High Performance
    Built on Starlette and Pydantic, FastAPI is one of the fastest frameworks for Python, providing high performance due to its asynchronous request handling.
  • Automatic Interactive API Documentation
    FastAPI automatically generates interactive API documentation via Swagger UI and ReDoc, which are very helpful for development and testing.
  • Type Checking and Validation
    With Pydantic models and Python type hints, FastAPI provides automatic data validation and type checking, reducing the chance of runtime errors.
  • Ease of Use
    Its syntax and design make it easy to learn for Python developers, offering a smooth development experience while reducing boilerplate code.
  • Asynchronous Support
    FastAPI supports asynchronous programming, allowing for better performance for I/O-bound operations, making it optimal for handling many simultaneous connections.
  • Extensive Documentation
    It has comprehensive and well-structured documentation, which is very useful for both beginners and advanced users.
  • Community and Ecosystem
    FastAPI has a growing community and ecosystem, with many plugins and integrations available to extend its functionality.

Possible disadvantages of FastAPI

  • Learning Curve for Asynchronous Programming
    Although FastAPI itself is easy to learn, grasping the concepts of asynchronous programming in Python can be challenging for beginners.
  • Complex Dependencies
    Using Pydantic for advanced validation can make the request models complex, requiring a deeper understanding of Pydantic and its functionalities.
  • Early Stage Libraries
    Some third-party libraries and extensions specifically tailored for FastAPI might still be in early stages of development and lack long-term stability.
  • Limited Real-World Examples
    Although the documentation is extensive, there might be limited real-world examples and case studies readily available compared to more mature frameworks.
  • Deployment Complexity
    Deploying FastAPI applications might be more complex in comparison to traditional synchronous frameworks, mainly due to the need for asynchronous server setups.

Analysis of FastAPI

Overall verdict

  • FastAPI is widely regarded as a good choice, especially for applications that require high performance, scalability, and modern Python features. It is suitable for both simple and complex projects, making it a versatile tool in the web development ecosystem.

Why this product is good

  • FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It is built on top of Starlette for web framework capabilities and Pydantic for data validation and settings management. FastAPI is known for its excellent performance, automatic generation of interactive API documentation (with Swagger and Redoc), and support for asynchronous programming. Developers appreciate its ease of use, detailed documentation, and helpful error messages.

Recommended for

  • Developers building RESTful APIs
  • Teams looking for a high-performance ASGI-based web framework
  • Projects that require asynchronous programming capabilities
  • Applications needing automatic generation of interactive API documentation
  • Python developers who prefer utilizing type hints for code clarity and validation

Retool videos

Retool - Logic Review

More videos:

  • Review - #Worth?! Ep.12 - Retool (Gameplay / Review)
  • Demo - February NY Enterprise Tech Meetup: Retool Demo

FastAPI videos

FastAPI from the ground up

More videos:

  • Tutorial - 30 Days of Python - Day 14 - Web App with Flask, FastAPI, ngrok, and Invictify - Python TUTORIAL
  • Review - [PT] Python - API com FastAPI - Chat | twitch.tv/codeshow

Category Popularity

0-100% (relative to Retool and FastAPI)
No Code
100 100%
0% 0
Developer Tools
33 33%
67% 67
API Tools
0 0%
100% 100
Productivity
100 100%
0% 0

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Retool and FastAPI

Retool Reviews

Top 5 Dynobase alternatives you should know about - March 2025 Review
The choice ultimately depends on your environment and use case. Many teams use a combination of tools: for example, Dynomate for developers, and a Retool app for operations or support teams. By understanding the strengths of each alternative, you can select the tool (or combination of tools) that best integrates with your AWS workflow, making DynamoDB development smoother...
Source: www.dynomate.io
React UI Components Libraries: Our Top Picks for 2023
Retool offers extensive documentation and support. Its support is available on its Discourse forum, Slack (if you are a Retool power user), Intercom for live chat, and dedicated support for enterprise customers.
Source: kinsta.com
ILLA Cloud vs. Retool vs. Bubble - Unveiling the Best Low-Code Platforms
In the quest for the best low-code platform, Retool, Bubble, and ILLA Cloud all offer unique features and capabilities. While Retool shines with its self-hosted option and Bubble contributes to the open-source community, ILLA Cloud stands out as a powerful and flexible low-code platform. With its comprehensive feature set, affordable pricing models, and self-hosted...
Top 9 Low-Code Tools for 2023 for low-code development
Retool is a powerful low-code platform that enables developers to build internal tools and apps with ease. It offers a drag-and-drop interface and a wide range of pre-built components for seamless development. Retool integrates with various data sources and external services, allowing users to fetch data, perform calculations, and display results in real-time. Its...
Superblock vs Retool: A Comprehensive Comparison for Low-code development Platforms
Retool caters to a diverse audience, including developers, product managers, and business professionals. Developers benefit from Retool's low-code capabilities, allowing them to build applications quickly without sacrificing customization. Product managers can leverage Retool to streamline internal workflows and enable teams to be more productive. Business professionals can...

FastAPI Reviews

  1. Kurslog team
    ยท Working at Kurslog ยท

    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 combination of Pydantic for data validation and built-in async support keeps our shared codebase clean, strictly typed, and reliable. But the biggest highlight for our cross-functional team is the automatic generation of interactive OpenAPI (Swagger) documentation. Our frontend and mobile developers no longer have to wait for backend engineers to manually update API docs; everything stays perfectly in sync automatically. It has drastically improved our team's communication and delivery speed.

    ๐Ÿ Competitors: Django, Flask, ExpressJS, Nest.js, Spring Boot
    ๐Ÿ‘ Pros:    Blazing fast performance (on par with nodejs and go)|Native asynchronous support out of the box|Automatic, interactive documentation generation (swagger/redoc)|Strict typing and data validation with pydantic
    ๐Ÿ‘Ž Cons:    Smaller plug-and-play ecosystem compared to older frameworks like django|Requires our architects to design the project structure and directory layout from scratch

The 20 Best Laravel Alternatives for Web Development
FastAPI, as the name hints, is a swift mover. Built on Starlette, itโ€™s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now thatโ€™s something.
25 Python Frameworks to Master
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 frameworks like Django.
Source: kinsta.com
3 Web Frameworks to Use With Python
myapp/ is the main directory of your FastAPI application. It includes all the other files and directories needed for the application.static/ is a directory used to store static assets such as CSS, JavaScript, and image files. These assets are served directly by the web server and are typically used to add visual styling and interactivity to the application.css/, img/, js/...
Best Alternatives to FastAPI App Free for Windows (2021)
FastAPI Alternative โ€“ So many alternatives app to FastAPI that you must to know out there. And, looking for an ideal software was not easy matter. Lucky you, at this page you can find the best replacement app for FastAPI. So what you are waiting for, get the latest FastAPI alternative app for Windows 10 from this page.
Top 5 Back-End Frameworks to Consider for Web Development in 2021
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It is fast when compared to other major Python frameworks like Flask and Django. FastAPI gives great flexibility to fulfill businessesโ€™ API needs in todayโ€™s evolving world.

Social recommendations and mentions

Based on our record, FastAPI should be more popular than Retool. It has been mentiond 311 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Retool mentions (104)

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FastAPI mentions (311)

  • Shipping Sovereign SDK: Cryptographic Forensic Receipts and the End of the AI "Prose Tax"
    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 / about 2 months ago
  • 5-Minute AI Jobs and Closed Tabs โ€” Why We Built Replay-Then-Tail SSE
    We had a feature in production where a single user request could run for five-plus minutes โ€” fetch documents, chunk them, hit an LLM per chunk, synthesize a final answer. We did the obvious thing first: a FastAPI handler that ran the pipeline and streamed progress back to the browser over Server-Sent Events. - Source: dev.to / 3 months ago
  • FastAPI With LangChain and MongoDB
    FastAPI is a Python framework for building APIs quickly, efficiently, and with very little code. - Source: dev.to / 3 months ago
  • I Built A " CrowdSense AI " : A Scalable, Context-Aware Platform for Smart Stadiums
    Backend: Python-based FastAPI for its asynchronous I/O capabilities and rapid JSON serialization. - Source: dev.to / 3 months ago
  • Async PyMongo in FastAPI
    FastAPI is a high-performance web framework that is production-ready and designed for building APIs in python, with roots embedded in asynchronous programming. It embraces Pythonโ€™s asyncio model as its core principle rather than treating it as optional. This design choice gives FastAPI leverage for I/O bound workloads such as db access, external API calls and real-time data streaming. - Source: dev.to / 3 months ago
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What are some alternatives?

When comparing Retool and FastAPI, you can also consider the following products

Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

Flask - a microframework for Python based on Werkzeug, Jinja 2 and good intentions.

Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple

Appsmith - Appsmith is an open source web framework for building internal tools, admin panels, dashboards, and workflows.

Django - The Web framework for perfectionists with deadlines