
The AI workspace where teams and agents get work done together
Connected Papers records 750,576 monthly visits with +3.1% month-over-month growth and Freemium pricing. HydraDB OSS records 29,635 monthly visits with +5.8% growth and Freemium, Contact for Pricing pricing.

Graph database built on object storage for agent memory and context
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | connectedpapers.com | hydradb.com |
| Pricing Model | Freemium | Freemium, Contact for Pricing |
| Monthly Visits | 750.58K (750,576) | 29.64K (29,635) |
| MoM Traffic Delta | +22.43K (+3.1%) | +1.61K (+5.8%) |
| Primary Market & Share | 🇺🇸 United States (17.6%) | 🇮🇳 India (65%) |
| Direct Visits / mo | 308.44K | 17.15K |
| User Rating | 4.7 | 4.4 |
| Supported Platforms | Website | Website |
Explore the academic literature as a visual graph of related papers
Each graph places the seed paper among its most closely related works, clustered by how often papers are cited together or share references.
Separate perspectives show what a paper builds on and what later work builds on it, which is ideal for tracing a research lineage.
Start from a paper title, DOI, URL or proceedings link, so you can enter the graph from whatever you already have at hand.
A ranked list view lets you browse related publications by relevance when you need specifics rather than an overview.

Graph database built on object storage for agent memory and context
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.
One query can traverse graph relationships and run vector, BM25, and reranked search together, so agents do not have to orchestrate four separate systems.
Every change is tracked, letting agents recall what happened, when, and in what sequence, which supports auditability and long-running agent workflows.
OpenCypher over Bolt plus an HTTP API and SDKs make it approachable for teams already familiar with property graphs.

The AI workspace where teams and agents get work done together

Provides broader citation data across millions of papers, but lacks Connected Papers' proprietary graphical relationship view.
Provides broader citation data across millions of papers, but lacks Connected Papers' proprietary graphical relationship view.

SpecialistFocuses on answering specific research questions with extracted evidence, rather than exploring visual citation graphs.
SpecialistFocuses on answering specific research questions with extracted evidence, rather than exploring visual citation graphs.

SpecialistIntegrates deep PDF reading and analysis workspaces, but lacks dedicated visual citation network mapping capabilities.
SpecialistIntegrates deep PDF reading and analysis workspaces, but lacks dedicated visual citation network mapping capabilities.
SpecialistExcels at automating systematic reviews and data extraction, but lacks interactive graphical citation tree exploration.
SpecialistExcels at automating systematic reviews and data extraction, but lacks interactive graphical citation tree exploration.
SpecialistTracks citation reliability and context via Smart Citations, but offers less visual graph-based exploration of literature.
SpecialistTracks citation reliability and context via Smart Citations, but offers less visual graph-based exploration of literature.

Offers a similarly polished visual literature mapping interface, but adds collaborative collection management features.
Offers a similarly polished visual literature mapping interface, but adds collaborative collection management features.
SpecialistStreamlines literature search and reference management, but does not provide an interactive visual citation graph.
SpecialistStreamlines literature search and reference management, but does not provide an interactive visual citation graph.
The managed vector database and knowledge engine for production AI

A memory and continual-learning engine that gives any AI agent persistent context
A memory and continual-learning engine that gives any AI agent persistent context
Free / Open-sourceOpen-source AI memory that reasons, not just stores

Fully managed Vector Lakebase and vector database for enterprise AI, built by the creators of Milvus
Fully managed Vector Lakebase and vector database for enterprise AI, built by the creators of Milvus