Bottleneck
Rate limiter that makes throttling easy for API calls and tasks.
- Status
- UnmaintainedNo commits in 2227 days.
- Last checked
- Checked · Oct 14, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Bottleneck is a rate-limiting library designed to simplify the process of throttling API requests or any task. It helps prevent overloading services by controlling the frequency at which actions are executed, ensuring smooth operation under high load conditions.
Bottleneck stands out as a lightweight yet powerful library for managing task execution rates, offering developers an easy-to-use solution for implementing effective rate limiting without the need for complex configurations or additional services.
When it fits — and when it doesn’t
A good fit for
Developers needing to manage high-frequency operations without overwhelming backend systems.
Projects requiring precise control over API request rates to avoid hitting rate limits or service outages.
Look elsewhere if
Scenarios where real-time processing is critical and cannot tolerate any delay due to throttling.
Use cases that require complex, adaptive rate-limiting strategies beyond simple frequency controls.
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited documentation and examples
The official documentation lacks comprehensive guides for complex use cases, making it difficult for new users to fully leverage the library.
- 02
Performance degradation under extreme load conditions
Bottleneck's performance can degrade when handling an extremely high volume of requests simultaneously, leading to increased latency and potential service disruptions.
- 03
Limited support for advanced rate-limiting strategies
The library does not natively support more sophisticated rate-limiting mechanisms such as token bucket or leaky bucket algorithms, which are crucial in certain high-load scenarios.
What it does well
Simplified rate limiting for API calls and tasks.
Supports both synchronous and asynchronous operations.
Flexible configuration options to tailor throttling behavior.
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up Bottleneck
Setup steps, common gotchas and what to check after 30 days.
Get the badge
A small badge for Bottleneck’s README or site: its name, “Tracked on AI Navigator”, and the availability status and check month from this page. It updates as the catalog does.
Markdown
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