Nearley vs Jison

Side-by-side — pricing, strengths, tradeoffs, and fit.

Nearley

Simple, fast, powerful parsing for JavaScript.

Jison

Friendly JavaScript parser generator inspired by Bison and Yacc.

At a glance

Open SourceFree Tier
◌ Declining·From $0
Open SourceFree Tier
◌ Declining·From $0

Overview

One-liner

Simple, fast, powerful parsing for JavaScript.

One-liner

Friendly JavaScript parser generator inspired by Bison and Yacc.

Maturity

Declining

Maturity

Declining

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Open source — free to use

Free tier

✓ Available

Open source — free to use

Starts at

$0

Starts at

$0

Model

Flat rate

Model

Flat rate

Enterprise

✕ None

Enterprise

✕ None

Best for

✓ Best for

JavaScript developers who need to implement grammars and parsing logic in their projects
Teams working on complex data transformation tasks that require robust parsing capabilities
Projects where custom language or format support is necessary and performance is a concern

✓ Best for

Developers working on projects requiring custom parsing logic in JavaScript
Teams building DSLs and need a robust parser generator tool
Individual developers who prefer open-source solutions for text processing tasks

Not ideal for

✕ Not for

Developers looking for a full-fledged natural language processing library (Nearley focuses on context-free grammars)
Users who need real-time parsing in high-throughput systems (Nearley may not be optimized for such scenarios)

✕ Not for

Projects that require real-time parsing with extremely low latency
Applications where the overhead of setting up an additional library is not acceptable

Strengths

↑ Strengths

Simple and easy-to-use parser generator for JavaScript
Supports context-free grammars
Fast parsing capabilities
Extensive documentation and community support

↑ Strengths

Generates JavaScript parsers from BNF grammars
Supports both LALR(1) and SLR(1) parsing algorithms
Easy to integrate into existing projects as a library

Weaknesses

↓ Weaknesses

Limited language support
Complex setup for non-trivial grammars
Performance issues with large inputs
Small community and limited third-party support

↓ Weaknesses

Steep learning curve for new users
Limited documentation and examples
Performance overhead for complex grammars
Limited community support and activity
Full Nearley profile →Full Jison profile →