Dev tools · alternatives · 2026
24 alternatives to Pisa – Performant Indexes and Search for Academia
PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
Pisa is a search and indexing system launched in 2019 that focuses on performance optimization. Designed for academic and research applications, it provides tools for building efficient indexes and running fast… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Pisa – Performant Indexes and Search for Academia launched in 2019; newer entries below may have overtaken it.
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PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
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PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2020 · github.com · its alternatives →
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PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
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PISA: Performant Indexes and Search for Academia. Contribute to pisa-engine/pisa development by creating an account on GitHub.
2019 · github.com · its alternatives →
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Consensus▲407A search engine that finds you answers in scientific papers
2022 · consensus.app · its alternatives →
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- 7BI
2020 · binarysearch.io · its alternatives →
- 8
Tantivy▲68A full-text, horse-speed search engine library in Rust
2022 · github.com · its alternatives →
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Hey, HN! You probably know that the ordering of products on Amazon, posts in FB, and search results in Google is personalized for each visitor, as it directly affects conversion, click rate and engagement. But not everyone can afford to hire an army of PhDs to squeeze every penny out of the ranking, and not everyone agrees on the current (im)balance between privacy and profits. So we built Metarank, an open-source and privacy-focused personalization engine. It can rerank in real-time any type of content, using only the data you allow, and optimize metrics you define. We made a lot of…
2022 · github.com · its alternatives →
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An index for agents pushing the frontier of AI/ML research
Jun 2026 · docs.firecrawl.dev · its alternatives →
- 12AS
2013 · insightdatascience.com · its alternatives →
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I’ve started building a distributed search engine for scholarly literature, which is completely contained within a browser extension: install it from the Chrome Web Store. It uses WebRTC and magic, and is currently, like, right now, used by 0 people. It’s you who can be number...
2014 · juretriglav.si · its alternatives →
- 14WD
2023 · svmetasearch.eu.org · its alternatives →
- 15AN
2013 · scholr.ly · its alternatives →
- 16FT
2021 · gutensearch.com · its alternatives →
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Meilisearch AI▲241Boost relevance and UX with fast hybrid and semantic search
2025 · meilisearch.com · its alternatives →
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Hey HN, we want to share HelixDB (https://github.com/HelixDB/helix-db/), a project a college friend and I are working on. It’s a new database that natively intertwines graph and vector types, without sacrificing performance. It’s written in Rust and our initial focus is on supporting RAG. Here’s a video runthrough: https://screen.studio/share/szgQu3yq. Why a hybrid? Vector databases are useful for similarity queries, while graph databases are useful for relationship queries. Each stores data in a way that’s best for its main type of query (e.g.…
2025 · github.com · its alternatives →
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Last summer we faced a conundrum at my company, Tiger Data, a Postgres cloud vendor whose main business is in timeseries data. We were trying to grow our business towards emerging AI-centric workloads and wanted to provide a state-of-the-art hybrid search stack in Postgres. We'd already built pgvectorscale in house with the goal of scaling semantic search beyond pgvector's main memory limitations. We just needed a scalable ranked keyword search solution too. The problem: core Postgres doesn't provide this; the leading Postgres BM25 extension, ParadeDB, is guarded behind AGPL; developing our…
Mar 2026 · github.com · its alternatives →
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We’re a startup called Scholastica(http://bit.ly/rSYdfa), an academic journal publishing platform and scholarly community. We applied to Y-Combinator Spring 2011, PG actually wrote us to ask us some further questions, but unfortunately didn’t get in. With that said, we didn’t give up and have an application with some traction. We’re completely bootstrapped and would love for you guys to check us out and hear your thoughts. Problem:Academics spend their time doing research, then have other scholars peer-review this research at an academic journal, then journals hand over the articles they…
2012 · bit.ly · its alternatives →
- 21OC
2014 · speedcite.com · its alternatives →
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Cito▲116Hybrid academic search over 236M papers, built for agents
Jul 2026 · cito.fim.ai · its alternatives →
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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 →
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Visual metasearch engine built with TypeScript, React, Redux & Express - JoshuaRabiu/spresso-search
2018 · 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 →