How do their growth rates compare?

HydraDB OSS has a month-over-month growth rate of +5.8%; Polygres has -52.3%.

How does pricing compare?

HydraDB OSS: Freemium, Contact for Pricing. The open-source edition is free to self-host with community support. Managed cloud starts around $25/month minimum usage, a Scale tier around $300/month, and an Enterprise plan with custom (contact sales) pricing. Polygres: Freemium. Polygres follows a freemium model with a free tier for getting started and paid managed plans for production workloads. Exact tiers are published on the company's pricing page, so check there for current numbers before budgeting.

What are alternatives to HydraDB OSS and Polygres?

Other tools in related categories include Notion, Exa, You.com, Algolia, Pinecone.

HydraDB OSS vs Polygres — Traffic (29.64K vs 4.02K), Pricing & Verdict

Open AI Tools

HydraDB OSS vs Polygres — Traffic (29.64K vs 4.02K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	HydraDB OSS	Polygres
Official Domain	hydradb.com	polygres.com
Pricing Model	Freemium, Contact for Pricing	Freemium
Monthly Visits	29.64K (29,635)	4.02K (4,018)
MoM Traffic Delta	+1.61K (+5.8%)	-4.41K (-52.3%)
Primary Market & Share	🇮🇳 India (65%)	🌐 Global (—)
Direct Visits / mo	17.15K	1.61K
User Rating	4.4	4.1
Supported Platforms	Website	Website

HydraDB OSS

Graph database built on object storage for agent memory and context

Object-storage-native engine

Graph, WAL, value, and index data all live in S3-compatible storage with a hot/warm/cold tiering strategy, cutting infrastructure cost dramatically versus memory-resident graph databases.

Unified retrieval layer

One query can traverse graph relationships and run vector, BM25, and reranked search together, so agents do not have to orchestrate four separate systems.

Temporal versioning and memory

Every change is tracked, letting agents recall what happened, when, and in what sequence, which supports auditability and long-running agent workflows.

Neo4j-compatible interfaces

OpenCypher over Bolt plus an HTTP API and SDKs make it approachable for teams already familiar with property graphs.