Software Alternatives & Startups

FastAPI VS Dash by Plotly

Compare FastAPI VS Dash by Plotly and see what are their differences

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.

Rating
5.0 · 1 review
Pricing
Open source Free
Dash by Plotly

Dash is a Python framework for building analytical web applications. No JavaScript required.

Rating
0 reviews
Pricing
Open source

Which is more popular?

Based on our record, FastAPI seems to be a lot more popular than Dash by Plotly. While we know about 313 links to FastAPI, we've tracked only 2 mentions of Dash by Plotly.

social mentions
313 vs 2
Developer Tools popularity
97% vs 3%
alternatives listed
240+ vs 11

Base details

Website, pricing, platforms and company facts side by side.

FastAPI
Dash by Plotly
Website fastapi.tiangolo.com plotly.com
Pricing
Open source Free
Open source
Company Startup from Colombia —
Listed in

Features and specs

What each product offers, as listed by its team.

FastAPI 7 features
Dash by Plotly 4 features
  • 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

  • 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.
  • Interactive Visualizations
    Dash by Plotly allows users to create highly interactive visualizations with ease, using a combination of Python, R, or Julia. It supports a wide variety of visualization components, which can be easily customized and stylized to the user's needs.
  • End-to-End Platform
    Dash is an end-to-end platform that covers the entire data visualization pipeline from data processing to the presentation layer. This allows users to seamlessly transition from data analysis to sharing insights without having to switch tools.
  • Open-Source
    Dash is an open-source framework, which allows for a high level of customization. It benefits from community contributions and offers transparency because users can view and modify the source code as needed.
  • Python Integration
    Dash is tightly integrated with Python, which is a major advantage for data scientists and analysts who use Python for data manipulation and analysis. It leverages the robust ecosystem of Python libraries, like Pandas and NumPy.

Possible disadvantages

  • Limited Custom Components
    While Dash provides many components for building applications, it can sometimes be limiting when you need highly customized features or specific integrations that aren't available out of the box.
  • Learning Curve
    For users not familiar with web development concepts (like HTML, CSS, and JavaScript), Dash can have a steep learning curve because it requires understanding how web applications are structured and deployed.
  • Performance
    Dash applications can become sluggish with large datasets or highly interactive charts, as the client-side rendering can be resource-intensive. This can make it difficult to handle applications at scale without optimization.
  • Deployment Complexity
    Deploying Dash applications might be challenging, especially for users without experience in setting up servers or cloud environments. While there are services provided by Plotly for deployment, they can add extra cost and require technical setup.

Analysis

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

FastAPI
Dash by Plotly

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

No analysis of Dash by Plotly yet.

Videos

Walkthroughs and reviews on video.

FastAPI 3 videos + Add
Dash by Plotly 0 videos + Add

FastAPI from the ground up

More videos

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

No Dash by Plotly videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
FastAPI
Dash by Plotly
97% 97%
3% 3%
100% 100%
0% 0%
93% 93%
7% 7%
0% 0%
100% 100%

User comments

Share your experience with using FastAPI and Dash by Plotly. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

FastAPI 5.0 · 1 review
Dash by Plotly no reviews yet
  • Rated 5/5 by Kurslog team
    SaaSHub review
    · Apr 2026

    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...

  • The 20 Best Laravel Alternatives for Web Development
    tms-outsource.com · Jan 2024

    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.

  • 25 Python Frameworks to Master
    kinsta.com · Oct 2023

    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...

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

FastAPI 313 mentions
Dash by Plotly 2 mentions
  • ContexteTech is now open source: a hub for everything that adapts an AI model
    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 / 6 days ago
  • I Built My First Machine Learning API — Here's Everything I Learned
    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
  • 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 / 4 months ago

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Alternatives to FastAPI and Dash by Plotly

When comparing FastAPI and Dash by Plotly, you can also consider the following products.