Vellum suits individuals looking for an AI assistant to handle personal tasks across files, calendars, email, code, and computer controls.
Free plan Open source From $30 a month AndroidiPhone & iPadWebWindowsMacBrowser extension+2
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Best LLM Application Development Frameworks 2026
Facts read 24 Sep 2026 – 15 Oct 2026
Frameworks for LLM applications provide components for language-model retrieval, agents, prompts and workflow graphs. Developers can use this list to compare those components for phones, laptops, servers and hosted projects.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 Vellum | Vellum suits individuals looking for an AI assistant to handle personal tasks across files, calendars, email, code, and computer controls. | 6.4 | $30 a month | Free plan | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 |
| 02 Scanopy | Scanopy is presented for homelabs, IT operations, MSPs, security and compliance teams, and platform and DevOps teams. | 6.3 | Free plan | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 |
| 03 Flowise | Flowise suits developers and teams building agent or LLM workflows who want visual orchestration, deployment choices, and developer access. | 5.4 | $35 a month | Free plan | Web, Windows, Mac, Linux | 1 Oct 2026 |
| 04 Vercel | Vercel suits teams deploying web applications from Git repositories and working with its listed frameworks. | 4.9 | $20 usage-based | Free plan | Web, API | 29 Sep 2026 |
| 05 LangChain | LangChain suits developers building model-and-tool agents in Python or JavaScript/TypeScript. | 4.8 | $39 usage-based | Free plan | API, Self-hosted | 4 Oct 2026 |
| 06 LlamaIndex | LlamaIndex is aimed at developers and enterprises automating document processing and knowledge work. | 4.8 | $50 usage-based | Free plan | Web, Linux, API, Self-hosted | 7 Oct 2026 |
| 07 txtai | txtai suits developers and teams building semantic search, language-model workflows, or multimodal applications. | 4.8 | Free plan | Free plan | Windows, Mac, Linux, API | 5 Oct 2026 |
| 08 Langflow | 4.7 | Free plan | Free plan | Web, Windows, Mac, Linux | 30 Sep 2026 | |
| 09 Haystack | Haystack is aimed at AI developers and engineers building modular, transparent systems. | 4.6 | Free plan | Free plan | API, Self-hosted | 7 Oct 2026 |
| 10 Pathway Live Data Framework | Pathway suits developers building data pipelines for analytics or AI over stored and live data. | 4.5 | Free plan | Free plan | API, Self-hosted | 4 Oct 2026 |
The finder is ordered by newest releases first. It uses figures published by the makers and does not score entries.
02
Scanopy
Scanopy is presented for homelabs, IT operations, MSPs, security and compliance teams, and platform and DevOps teams.
WebWindowsMac+3 Record6.3 Visit
03
Flowise
Flowise suits developers and teams building agent or LLM workflows who want visual orchestration, deployment choices, and developer access.
WebWindowsMac+3 Record5.4 Visit
04
Vercel
Vercel suits teams deploying web applications from Git repositories and working with its listed frameworks.
WebAPI Record4.9 Visit
05
LangChain
LangChain suits developers building model-and-tool agents in Python or JavaScript/TypeScript.
APISelf-hosted Record4.8 Visit
6
LlamaIndex
WebLinuxAPI+1 $50 usage-based Record4.8 Visit LlamaIndex is aimed at developers and enterprises automating document processing and knowledge work.
7
txtai
WindowsMacLinux+2 Free plan Record4.8 Visit txtai suits developers and teams building semantic search, language-model workflows, or multimodal applications.
9
Haystack
APISelf-hosted Free plan Record4.6 Visit Haystack is aimed at AI developers and engineers building modular, transparent systems.
10
Pathway Live Data Framework
APISelf-hosted Free plan Record4.5 Visit Pathway suits developers building data pipelines for analytics or AI over stored and live data.
Before you choose
Check the starting cost
Look for a free plan when you are prototyping or learning. Free plans appear for AG2, AgentScope, Apache Burr, AutoGen, AWS Strands Agents, BAML and Eino.
Freemium tools can add paid tiers. Agno offers a free plan, a 14-day trial and paid access starting at $150 per month. Flowise lists a free plan and paid tiers from $35 per month.
Match the platform to your project
Entries cover Linux, Windows, macOS, web, API and self-hosted use. Choose a framework that fits where your application will run and how you plan to operate it.
Compare the application pieces
The comparison fields show whether a framework supports RAG, agents and tools, workflow graphs or prompt optimization. These capabilities cover retrieval, action-taking, flow control and prompt refinement.
Review language and license fit
Check each framework's primary language and JavaScript or TypeScript SDK availability against your codebase. If you need to read or change the code, review the open-source license before adopting a framework.
CAMEL-AI and DSPy appear with open-source pricing notes.
Questions
Which frameworks have a free plan?
Free-plan entries include AG2, AgentScope, Agno, Apache Burr, AutoGen, AWS Strands Agents, BAML, CrewAI AMP, DSPy, Eino and Flowise.
Which tools list an open-source model?
The pricing notes identify CAMEL-AI and DSPy as open source.
Are free trials available?
Agno combines its free plan with a 14-day trial and a paid tier.
What platforms do these frameworks support?
The comparison includes deployments for Linux, Windows, macOS, web, API and self-hosted environments.
What technical features can I compare?
You can compare RAG, agent and tool use, workflow graphs, prompt optimization, primary language and JavaScript or TypeScript SDK support.
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