Comparison

NucliaDB vs txtai

On the evidence we track, txtai leads this comparison with a composite score of 61/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

NucliaDB full profile →txtai full profile →

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NucliaDB56

★txtai61

Attribute comparison across 2 tools
Attribute	NucliaDB	txtaiLeader
vioscaleAI score	56 / 100medium · 51%	61 / 100medium · 56%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	open_source
Price levelpricing.price_level	high	free
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	1	5
Security
Gdprsecurity.gdpr	✓	-
Iso27001security.iso27001	✓	-
Scorecardsecurity.scorecard	-	5.4
Soc2security.soc2	✓	-
Vulnerabilitiessecurity.vulnerabilities	-	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=txtai&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	-	14
Github starsadoption.github_stars	-	13,018
Activity
Commits last 30dactivity.commits_last_30d	-	100
Release
Cadence daysrelease.cadence_days	-	27
Historyrelease.history	-	20 items
License
Spdxlicense.spdx	-	Apache-2.0
Language
Primarylanguage.primary	-	Python
Content
Faqcontent.faq	5 items	6 items

Score

vioscaleAI score

NucliaDB56 / 100medium · 51%

txtai61 / 100medium · 56%

Pricing

Free tier

NucliaDB✓

txtai✓

Model

NucliaDBcommercial

txtaiopen_source

Price level

NucliaDBhigh

txtaifree

Transparent

NucliaDB✓

txtai✓

Integrations

Count

NucliaDB1

txtai5

Security

Gdpr

NucliaDB✓

txtai–

Iso27001

NucliaDB✓

txtai–

Scorecard

NucliaDB–

txtai5.4

Soc2

NucliaDB✓

txtai–

Vulnerabilities

NucliaDB–

txtaiCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=txtai&per_page=100 · Last 12m: 0

Reliability

Status page

NucliaDB–

txtai✓

Adoption

Dependent repos

NucliaDB–

txtai14

Github stars

NucliaDB–

txtai13,018

Activity

Commits last 30d

NucliaDB–

txtai100

Release

Cadence days

NucliaDB–

txtai27

History

NucliaDB–

txtai20 items

License

Spdx

NucliaDB–

txtaiApache-2.0

Language

Primary

NucliaDB–

txtaiPython

Content

Faq

NucliaDB5 items

txtai6 items

Capabilities

Feature-by-feature on the axes that matter for vector databases. “-” means undocumented, not absent.

Capability comparison for Vector Databases
Capability	NucliaDB	txtai
Deployment
Deployment	Managed	Embedded
Serverless / consumption pricing	✗	-
Index
ANN index (HNSW / IVF / DiskANN / ScaNN / flat)	-	HNSW, IVF, IVFSparse, milvus-lite, turbovec, zvec
Distance metrics (cosine / dot / Euclidean)	-	cosine
Query
Metadata filtering	-	Pre-filter
Hybrid search (dense + sparse fusion)	✓	✓
Built-in BM25 / lexical	-	✓
Storage
Quantization	-	Scalar
On-disk vs in-memory	Disk-backed	Disk-backed
Scale
Multi-tenancy (namespaces / collections / tenants)	✓	✓
Horizontal scale	Sharded / distributed	Sharded / distributed
Consistency
Consistency	-	Tunable
Licensing
Licence class	Proprietary	Permissive OSS
Classification
Purpose-built vs feature-of-parent	Dedicated DBMS	Dedicated DBMS

Deployment

NucliaDBManaged

txtaiEmbedded

Serverless / consumption pricing

NucliaDB✗

txtai-

Index

ANN index (HNSW / IVF / DiskANN / ScaNN / flat)

NucliaDB-

txtaiHNSW, IVF, IVFSparse, milvus-lite, turbovec, zvec

Distance metrics (cosine / dot / Euclidean)

NucliaDB-

txtaicosine

Query

Metadata filtering

NucliaDB-

txtaiPre-filter

Hybrid search (dense + sparse fusion)

NucliaDB✓

txtai✓

Built-in BM25 / lexical

NucliaDB-

txtai✓

Storage

Quantization

NucliaDB-

txtaiScalar

On-disk vs in-memory

NucliaDBDisk-backed

txtaiDisk-backed

Scale

Multi-tenancy (namespaces / collections / tenants)

NucliaDB✓

txtai✓

Horizontal scale

NucliaDBSharded / distributed

txtaiSharded / distributed

Consistency

NucliaDB-

txtaiTunable

Licensing

Licence class

NucliaDBProprietary

txtaiPermissive OSS

Classification

Purpose-built vs feature-of-parent

NucliaDBDedicated DBMS

txtaiDedicated DBMS

What each one is

The product in its own terms, so the numbers below have context.

NucliaDB

Progress Agentic RAG is a RAG-as-a-Service platform providing a centralized agentic knowledge layer for building AI experiences with enterprise-scale governance, compliance, and multi-agent capabilities.

Independently observed

txtai

Leader

txtai is an open-source Python framework for building semantic search applications, LLM-powered agents, retrieval augmented generation systems, and language model workflows with support for multiple vector backends and integration with various LLMs.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

NucliaDB

from $700/moSubscriptionFree tier14-day trial

From $700/month. 14-day free trial available.

Starter$700/month
- RAG
- Q&A
- Community support
Pro$1,925/month
- RAG
- Q&A
- AI classification
- Generative search
- AI Assistant
- +2 more
EnterpriseContact sales
- RAG
- Q&A
- AI classification
- Generative search
- AI Assistant
- +4 more

as of 2026-08-03verify ↗

txtai

Leader

Open sourceFree tier

as of 2026-08-21verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	NucliaDB	txtai
WebPlatforms	✓	✓
CLIPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✗
Self-hostedDeployment	✗	✓
HybridDeployment	✓	✗

Platforms

Web

NucliaDB✓

txtai✓

CLI

NucliaDB✗

txtai✓

Deployment

Cloud / SaaS

NucliaDB✓

txtai✗

Self-hosted

NucliaDB✗

txtai✓

Hybrid

NucliaDB✓

txtai✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

NucliaDB

1 total

AWS Marketplace

Independently observed

txtai

Leader

12 total

llama.cpp
LiteLLM
Hugging Face
OpenAI
Claude
AWS Bedrock
smolagents
OpenCode
DuckDB
Milvus
LiteRT
Model Context Protocol

Independently observed

Still deciding?

NucliaDB or txtai: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.