Dev tools · alternatives · 2026

24 alternatives to Tantivy

A full-text, horse-speed search engine library in Rust

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Tantivy launched in 2022; newer entries below may have overtaken it.

1
SeekStorm – open-source sub-millisecond search in Rust▲245
SeekStorm: vector & lexical search - in-process library & multi-tenancy server, in Rust. - SeekStorm/SeekStorm
2024 · github.com · its alternatives →
2WB
We built a fast substring search engine in Go▲145
2013 · tamber.com · its alternatives →
3
Meilisearch AI▲241
Boost relevance and UX with fast hybrid and semantic search
2025 · meilisearch.com · its alternatives →
4
uFuzzy.js – A tiny, efficient fuzzy search that doesn't suck▲251
Hello HN! I became frustrated with the unpredictible/poor match quality and opaqueness of "relevance scores" in existing fuzzy and fulltext search libs, so I tried something different and this is the result. The main selling point is the result quality / ordering, with best-in-class memory overhead and excellent performance being bonuses. The API is pretty stable at this point, but looking for feedback before committing to 1.0. TL;DR The test corpus is a 4MB json file with 162k words/phrases, so give it a second for initial download. You can also drag/drop your own…
2022 · github.com · its alternatives →
5
Pisa – Full Text Search Engine Written in C++▲96
PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2020 · github.com · its alternatives →
6
Rust Based Per-Token Late Interaction Dense Search▲8
Happy to release FastPlaid, which aim to ease and accelerate ColBERT and ColPali retrieval
2025 · github.com · its alternatives →
7LA
Lingo – A linguistic database in Rust with nanosecond-level performance▲42
Hi HN, I made Lingo - the SQLite of semantic search. I'm a self-taught developer and researcher who left school at 16, and I've spent some time exploring a first-principles approach to system design for various frontier problems. In this case it's AI that challenges the 'bigger is better' transformer paradigm. Lingo is the first piece of that research, a high-performance linguistic database designed to run on-device. The full technical overview and manifesto is here: https://medium.com/@robm.antunes/bcd1e9752af6 The paper has been archived on Zenodo with a DOI:…
2025 · its alternatives →
8
Highly cost-efficient search engine in Rust▲61
Cloud-native OSS search engine for observability. Contribute to quickwit-oss/quickwit development by creating an account on GitHub.
2021 · github.com · its alternatives →
9
A fast HNSW implementation in Rust▲111
HNSW implementation in Rust. Reference: https://arxiv.org/ftp/arxiv/papers/1603/1603.09320.pdf - swapneel/hnsw-rust
2024 · github.com · its alternatives →
10
PISA – A text search engine able to run on large-scale collections▲48
PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
11
IResearch – C++ search that beat Lucene and Tantivy on their benchmark▲15
The First Real-Time Search Analytics Database. Contribute to serenedb/serenedb development by creating an account on GitHub.
May 2026 · github.com · its alternatives →
12
A Search Engine for Rust▲8
A search engine for Rust
2024 · query.rs · its alternatives →
13
Pisa – Probably the Fastest Full Text Search Engine Written in C++▲17
PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
14
Optimizing LiteLLM with Rust – When Expectations Meet Reality▲27
I've been working on Fast LiteLLM - a Rust acceleration layer for the popular LiteLLM library - and I had some interesting learnings that might resonate with other developers trying to squeeze performance out of existing systems. My assumption was that LiteLLM, being a Python library, would have plenty of low-hanging fruit for optimization. I set out to create a Rust layer using PyO3 to accelerate the performance-critical parts: token counting, routing, rate limiting, and connection pooling. The Approach - Built Rust implementations for token counting using tiktoken-rs - Added lock-free data…
Nov 2025 · github.com · its alternatives →
15AF
Apache Fory Rust – 10-20x faster serialization than JSON/Protobuf▲67
Serialization framework with some interesting numbers: 10-20x faster on nested objects than json/protobuf. Technical approach: compile-time codegen (no reflection), compact binary protocol with meta-packing, little-endian layout optimized for modern CPUs. Unique features that other fast serializers don't have: - Cross-language without IDL files (Rust ↔ Python/Java/Go) - Trait object serialization (Box) - Automatic circular reference handling - Schema evolution without coordination Happy to discuss design trade-offs. Benchmarks:…
Oct 2025 · fory.apache.org · its alternatives →
16
A modular, durable web-crawler for Clojure▲29
:racehorse:✈️ Pegasus is a scalable, modular, polite web-crawler for Clojure - shriphani/pegasus
2016 · github.com · its alternatives →
17
Pisa – Probably the Fastest Full Text Search Engine Written in C++▲13
PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
18
TF-IDF search engine in 30 lines of Scala▲43
Vector space model implemented in a few lines . Contribute to felipehummel/TinySearchEngine development by creating an account on GitHub.
2011 · github.com · its alternatives →
19
IndexFlow – Open-source indexing infrastructure built with Rust▲22
Open-source search engine indexing infrastructure with inline SEO quality gates, fair multi-site scheduling, and rolling quota circuit breaker. - IndexFlowing/IndexFlow-core
Aug 2026 · github.com · its alternatives →
20SA
Spart – A Rust library for fast spatial search with Python bindings▲31
Hi everyone, I've made an open-source library for fast spatial search in Rust. It's called Spart, and it currently provides the following features: - Five tree implementations: Quadtree, Octree, Kd-tree, R-tree, and R*-tree - Python bindings (`pyspart` on PyPI) - Fast k-nearest neighbor (kNN) and radius search - Bulk data loading for efficient tree construction Project's GitHub repo: https://github.com/habedi/spart
2025 · its alternatives →
21
Streaming full-text search for Node.js and browsers▲39
Stream based full-text search for Node.js and browsers. Built on LevelDB. - cshum/levi
2015 · github.com · its alternatives →
22
val – An arbitrary precision calculator language▲34
Wrote this to learn more about the `chumsky` parser combinator library, rustyline, and the `ariadne` error reporting crate. Such a nice DX combo for writing new languages. Still a work in progress, but I thought I'd share :)
2025 · github.com · its alternatives →
23
DeepSearch – a high-performance SMB directory scanner in Rust▲16
Contribute to dohuyhoang93/DeepSearch development by creating an account on GitHub.
Dec 2025 · github.com · its alternatives →
24
Witchcraft and Pickbrain – fast multi-vector semantic search in Rust▲6
Witchcraft is from-scratch Rust reimplementation of Stanford's XTR-Warp (SIGIR'25, https://arxiv.org/abs/2501.17788 ) multi-vector semantic search engine. Witchcraft runs out of a single SQLite database, is blazing-fast (21ms p.95 end-to-end search latency on NFCorpus on a MacBook Pro), accurate (33% NDCG@10), and easy to deploy in your own apps. The Witchcraft repo also comes with Pickbrain, a sample app and agent skill that you can use to instantly query across all your Claude Code and Codex CLI sessions, effectively giving your agents global long-term memory. Please…
Apr 2026 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →