Open-source billing engine for usage-based and AI/agent pricing, with real-time metering, credits and automatic invoicing.
flexprice.io
Alternatives to
ANTLR
Best alternatives to ANTLR in 2026
ANTLR is "Complex full-featured framework for top-down parsing.". If you are looking for an alternative to ANTLR in 2026 — whether for pricing, features or compatibility reasons — mySelectas has curated the 15 best options available. The most popular alternatives include: Bison, Flex. All these solutions are listed in the Informatique category.
Quick comparison of ANTLR alternatives
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#1
- ✓ Open source and self-hostable, not locked to a closed SaaS
- ✓ Fast real-time metering (sub-60ms at high volume)
FAQ about ANTLR alternatives
- What is the best alternative to ANTLR in 2026?
- Based on our selection, Flexprice is the best alternative to ANTLR in 2026. Open-source billing engine for usage-based and AI/agent pricing, with real-time metering, credits and automatic invoicing.. See our full ranking above to compare all options.
- Is ANTLR free?
- ANTLR is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to ANTLR are there?
- mySelectas has listed 15 alternatives to ANTLR in the Informatique category. Our selection is updated regularly to include the best options available.