18 Best Open Source ElasticSearch Alternatives in 2026

1

Meilisearch

Fast search engine with typo tolerance and hybrid search.

Meilisearch is a search engine API with typo tolerance, faceted search, and AI-powered hybrid search. Most of the code is MIT, while some Enterprise Edition parts are under the Business Source License 1.1.

Pricing: Free to self-host; Meilisearch Cloud is paid.

• Fast and easy to set up
• Typo tolerance and facets
• Hybrid search
• Some features are in a BUSL Enterprise Edition
• Not built for log analytics

2

Milvus

Cloud-native vector database for large-scale similarity search.

Milvus is an Apache-2.0 vector database built for similarity search at large scale, with Lite, Standalone, and distributed deployment modes. It integrates with LangChain and LlamaIndex and can be self-hosted or used through the managed Zilliz Cloud.

Pricing: Free to self-host; managed Zilliz Cloud is paid.

• Scales to very large datasets
• Several deployment modes
• Large ecosystem
• Distributed mode is complex to run
• Heavier than lightweight options

3

Qdrant

Rust vector database for production AI retrieval.

Qdrant is an Apache-2.0 vector database with similarity search, metadata filtering, hybrid retrieval, quantization, APIs, Docker deployment, and RAG integrations.

Pricing: Free and self-hostable under Apache-2.0; managed cloud may be paid.

• High-performance vector search
• Filtering, hybrid search, and quantization
• Strong RAG and AI ecosystem
• Not a full BaaS
• No application auth or file storage
• Requires other backend infrastructure

4

Onyx

Enterprise search and AI assistant across your company apps.

Onyx is an open-source AI platform for chat and enterprise search that connects to dozens of company apps with document-level permissions. Most of the code is MIT, while directories named ee are under the Onyx Enterprise License.

Pricing: Free self-hosted core; enterprise features are paid.

• Connects to many company apps
• Document-level permissions
• Works with any LLM
• Enterprise-licensed directories
• A search product, not a search engine library

5

Chroma

Open-source vector database for RAG and semantic search.

Chroma is an Apache-2.0 vector database for embeddings, retrieval, and RAG, with a simple Python and JavaScript API and metadata filtering. It runs locally during development or as a server or managed cloud in production.

Pricing: Free to self-host; managed cloud is paid.

• Very simple API
• Runs locally or in production
• Metadata filtering
• Less suited to the largest workloads than distributed engines
• Managed cloud is paid

6

Grafana Loki

Cost-efficient log aggregation with label-based indexing.

Grafana Loki is a log aggregation system that indexes labels instead of full text, uses object storage, and offers LogQL queries, alerting, and multi-tenancy for cloud-native and Kubernetes environments.

Pricing: Free self-hosted; managed and enterprise tiers available.

• Low-cost log storage on object storage
• Tight integration with Grafana
• LogQL and multi-tenancy
• No full-text indexing, so some searches are slower
• AGPL-3.0 license

7

Typesense

Fast typo-tolerant search engine with vector search.

Typesense is a GPL-3.0 search engine that is fast and typo tolerant and runs as a single binary, with vector search added. It is positioned as an alternative to Algolia and Pinecone, and is a search engine more than a pure vector database.

Pricing: Free to self-host; Typesense Cloud is paid.

• Simple single-binary setup
• Typo tolerance and faceting
• Self-hosted or managed
• GPL-3.0 license
• Search engine rather than a dedicated vector database

8

OpenObserve

Rust-built observability for logs, metrics, and traces.

OpenObserve is a Rust-built observability platform for logs, metrics, and traces with columnar storage, high compression, a stateless architecture, and OpenTelemetry compatibility, using object storage such as S3, GCS, or Azure Blob to reduce cost.

Pricing: Free self-hosted; hosted and enterprise plans available.

• Very low storage cost with high compression
• Logs, metrics, and traces in one tool
• OpenTelemetry compatible
• AGPL-3.0 license
• Younger than Grafana-based stacks

9

Logstash

Data processing pipeline for logs and events.

Logstash ingests data from many sources, transforms it with grok patterns and 200+ plugins, and routes it to destinations, and it integrates with the Elastic Stack. Source code is Apache-2.0 outside the x-pack folder, which is under the Elastic License.

Pricing: Free; Elastic subscriptions add commercial features.

• 200+ plugins and flexible outputs
• Persistent queues for reliability
• Mature Elastic Stack integration
• Resource heavy compared with Vector
• Mixed licensing between Apache and Elastic License

10

OpenSearch

Search and analytics suite, a fork of Elasticsearch.

OpenSearch is an Apache-2.0 search and analytics suite that began as a fork of Elasticsearch and is now a Linux Foundation project. It is the most direct replacement, with similar APIs, and offers vector search, dashboards, and observability tools.

Pricing: Free and open source; managed services from cloud providers.

• Closest drop-in Elasticsearch replacement
• Apache-2.0 under the Linux Foundation
• Vector search and dashboards
• Heavy to operate
• Diverging from Elasticsearch over time

11

Manticore Search

Search database with full-text, vector, and SQL support.

Manticore Search is a GPL-3.0 search database with full-text, vector, and hybrid search, real-time indexing, and a SQL interface. It is lighter than Elasticsearch, and its speed comparisons are the vendor's own.

Pricing: Free and open source.

• Light resource use
• SQL interface and MySQL protocol
• Full-text and vector search
• GPL-3.0 license
• Smaller ecosystem than Elasticsearch

12

Quickwit

Cloud-native search engine for logs and traces.

Quickwit is an Apache-2.0 search engine for logs, traces, and other observability data that separates compute from storage and indexes in real time. It is built for large append-only datasets rather than general application search.

Pricing: Free and open source.

• Compute and storage separated
• Low storage cost on object storage
• Real-time indexing
• Aimed at logs and traces
• Not for general app search

13

Orama

Search engine and RAG pipeline for browser, server, and edge.

Orama is an Apache-2.0 search engine and RAG pipeline that runs in the browser, on a server, or at the edge with full-text, vector, and hybrid search. A hosted flat-rate service is its main commercial offering.

Pricing: Free open-source library; hosted service is paid.

• Runs in the browser or at the edge
• Hybrid full-text and vector search
• Easy to embed
• In-memory focus limits very large datasets
• Hosted service is the commercial path

14

HelixDB

Graph database with native vector and full-text search.

HelixDB is an Apache-2.0 OLTP graph database written in Rust with native vector and full-text search, running on object storage. It combines graph traversal with vector search, and its speed figures are the vendor's own.

Pricing: Free to self-host; managed deployment is paid.

• Graph, vector, and full-text in one engine
• Written in Rust
• Active development
• Younger than established databases
• Performance claims are vendor-reported

15

Apache Pinot

Realtime distributed OLAP datastore.

Apache Pinot is an Apache-2.0 distributed OLAP datastore for sub-second analytical queries on streaming and batch data. It suits high-concurrency, user-facing analytics more than ad-hoc analyst queries or text search.

Pricing: Free and open source.

• Sub-second queries at high concurrency
• Real-time ingestion
• Apache Software Foundation project
• Complex to operate
• Not a general text search engine

16

Swirl

Federated AI search and RAG without moving your data.

Swirl is an Apache-2.0 search and RAG tool that queries your company apps in place instead of copying data into an index, supporting over 100 sources and on-premises deployment. It is a federated search layer, not a search engine.

Pricing: Free open-source edition; enterprise plans are paid.

• No data migration needed
• Many connectors
• On-premises deployment
• Federated search depends on each source's speed
• Smaller community

17

SeekStorm

Vector and lexical search library and server in Rust.

SeekStorm is an Apache-2.0 search engine written in Rust, available as an in-process library and a multi-tenant server with vector and lexical search. A hosted search API is sold separately.

Pricing: Free open-source engine; hosted API from $19 per month.

• Rust performance
• Library or server
• Vector and lexical search
• Small community
• Fewer integrations than Elasticsearch

18

Gigapipe

Unified logs, metrics, traces, and profiles.

Gigapipe is a unified observability platform for logs, metrics, traces, and profiles, compatible with OpenTelemetry, Loki, Prometheus, and Tempo, built on OLAP engines and NVMe storage with flat-cost pricing.

Pricing: Free self-hosted; flat-cost commercial offering.

• Compatible with Loki, Prometheus, Tempo, and OpenTelemetry
• All signals in one store
• Avoids data silos
• AGPL-3.0 license
• Smaller community