Open Source Perplexity Alternatives

Open WebUI is a self-hosted platform for running AI on your own infrastructure. It connects to local models via Ollama, cloud providers like OpenAI and Anthropic, or anything with a compatible API. Your data stays wherever you put it.

The platform supports voice, vision, retrieval-augmented generation, web search, and text generation out of the box. You can extend it with Python functions, so adding custom tools or integrations doesn't require forking the project or waiting on a roadmap. That's a meaningful difference from hosted options like Eden AI or Humanloop, where extensibility stops at the API boundary.

For teams and organizations, Open WebUI includes SSO, role-based access control, and audit logs. These features make it viable in regulated industries where most hosted AI tools aren't an option. One deployment can serve everyone from individual developers to large enterprise teams.

The community is substantial. Over 408,000 members share prompts, models, tools, and functions through openwebui.com. You can browse and install what others have built, or contribute your own. With 290 million downloads and 138,000+ GitHub stars, the project has real traction.

You own the deployment. No vendor account, no data leaving your environment unless you choose a cloud model, no subscription gating features. If you're already running tools like OpenHands or Pipeshub on your own infrastructure, Open WebUI fits the same pattern. The same platform runs on a laptop or scales to a full enterprise setup.

AnythingLLM is a desktop application and self-hostable platform that lets you chat with your documents, run AI agents, and work with large language models entirely on your own machine. No account required. No data leaves your device unless you explicitly connect to a cloud provider. It runs on macOS, Windows, and Linux.

The core use case is document chat. You load in PDFs, Word files, CSVs, codebases, or content pulled from online sources, then ask questions against that material. The underlying LLM can be a local model running on your own hardware or a cloud provider like OpenAI, Azure, or AWS. You pick which one, and you can switch between them. It also supports multi-modal models, so working with images or audio is possible within the same interface.

Privacy is a first-class concern. By default, everything stays local: the model, the vector database, the embedder, your documents, and your chat history. Nothing is shared unless you configure an external provider. That makes it a practical choice for anyone handling sensitive business documents who can't send data to third-party APIs — including use cases that would otherwise call for legal AI platforms.

For teams, there's a self-hosted or cloud-hosted option with multi-user support. Each user gets isolated access, and admins get fine-grained controls over what users can see and do. The platform can also be white-labeled with custom branding, which makes it usable as an internal tool under a company's own identity.

Beyond document chat, it includes a built-in developer API for integrating its capabilities into existing products. If you're building on top of it, the API fits naturally into the broader LLM application framework ecosystem. A community hub provides shared agent skills, system prompts, and slash commands, so you can extend what the assistant can do without building from scratch.

The MIT license means the source is open and free to use or modify. If you want a lighter-weight alternative focused purely on chat, tools like LLMChat or LobeChat cover that narrower scope. AnythingLLM sits closer to a full local AI workspace, with document ingestion, agent support, and multi-user access all in one place.

LibreChat is the ultimate open-source app for all your AI conversations, fully customizable and compatible with any AI provider — all in one sleek interface. It offers a wide range of features and capabilities, making it a versatile tool for developers, researchers, and anyone interested in exploring the world of AI.

Key Features:

• Multiple AI Models: Supports various AI models, including Anthropic, AWS, OpenAI, Azure, and more.
• Agents: Advanced agents with file handling, code interpretation, and API actions.
• Code Interpreter: Execute code in multiple languages securely via API with zero setup - Python, JavaScript, TypeScript, Go, and more.
• Artifacts: Create React, HTML code, and Mermaid diagrams in chat.
• Multimodal: Analyze images and chat with files using various endpoints.
• Fork: Split messages to create multiple conversation threads for better context control.
• Search: Search for messages, files, and code snippets in an instant.

With over 20,000+ GitHub stars and 2,810,000+ Docker pulls since its launch on January 10, 2023, LibreChat has quickly become a popular choice among developers and AI enthusiasts.

Khoj AI is revolutionizing the way we interact with information and manage our digital lives. This powerful, open-source personal AI application serves as your second brain, offering a range of features designed to enhance your productivity and decision-making processes.

Key features:

• Can understand PDFs, images, plaintext notes
• Connected to the internet. Get fresh information and scrape web pages.
• Create automations to get notified about world events, create custom newsletters
• Custom Agents with personas, custom knowledge bases and tool
• Support for speech to text, text to speech, vision
• Access to latest, state of the art models (Llama, Claude, GPT)

If you self-host Khoj, you get support for:

• 100% offline embeddings and inference if desired (i.e., no internet required). You can use any LLM of choice off of Huggingface.
• 100% offline speech to text
• Support web-scraping with the public URL's you provide, even if you're self-hosted
• Can customize your models with any OpenAI API-compatible server, including Ollama.

Khoj AI stands out with its commitment to transparency, allowing users to trace the AI's reasoning and minimize hallucinations. The platform's ability to generate custom newsletters, provide timely research, and offer event-based notifications makes it an invaluable tool for professionals and researchers alike.

Letta is an open-source platform that enables developers to build and deploy advanced AI agents.

Some key features include:

• Built-in memory management: Powered by the research behind MemGPT, Letta agents have self-managed memory capabilities, allowing them to maintain context over extended conversations and tasks.
• Reasoning capabilities: Agents can perform complex reasoning and decision-making based on their knowledge and context.
• Extensive tool support: Letta supports integration with over 7,000 tools, allowing agents to interact with a wide range of external systems and APIs.
• Visual development environment: The Agent Development Environment (ADE) provides an intuitive interface for iterating on agent prompts, tools, and model configurations.
• Production-ready infrastructure: Letta's cloud offering is designed for scalability, allowing agents to grow in utility over time.
• Model-agnostic approach: Developers can use their preferred language models and easily swap between different providers.
• Open-source core: The core Letta platform is open-source, promoting transparency and customization.

With its focus on memory management, extensive capabilities, and developer-friendly features, Letta aims to push the boundaries of what's possible with AI agents. Whether you're building prototypes or production-ready systems, Letta provides the tools and infrastructure to create more capable and context-aware AI assistants.

Connect any LLM to your internal knowledge sources and chat with it in real-time alongside your team. SurfSense transforms scattered company documents into a unified, intelligent workspace where collaboration meets AI-powered insights.

Key capabilities include:

• Real-time collaboration with live edits, synced content, and team presence
• 100+ leading LLMs available on-demand for customized AI interactions
• Hybrid search functionality across all connected knowledge sources
• Multimedia content creation including podcast generation from documents
• Contextual commenting directly within chats and documents

Extensive integrations with essential tools like Notion, GitHub, Slack, Discord, Gmail, Linear, Jira, Google Drive, Dropbox, Amazon S3, and many more. Whether you're managing research projects, collaborating on documentation, or seeking instant answers from your knowledge base, SurfSense centralizes everything in one intelligent workspace.

Perfect for teams looking to accelerate decision-making, enhance productivity, and unlock insights from their collective knowledge while maintaining seamless collaboration workflows.

Scira is a cutting-edge, minimalist AI search engine designed to provide instant answers with elegance and simplicity. By leveraging advanced AI technology, Scira strips away clutter to focus on delivering accurate and relevant results quickly.

Key Features:

• Clean Interface: A distraction-free design that puts the focus on your search results.
• AI-Powered Responses: Utilizes cutting-edge AI to understand context and provide precise answers.
• Web Search: Comprehensive web results powered by Tavily AI.
• Code Interpreter: Advanced code interpretation and execution via e2b.dev.
• Weather Forecast: Accurate weather information through OpenWeatherMap.
• URL Summary: Quick web content summarization using FireCrawl's Scrape API.
• Location Search: Find places and nearby locations with Google Maps API integration.
• Translation & TTS: Translate text and convert to speech using OpenAI TTS.

Scira combines the power of various AI services and APIs to create a versatile search experience. Whether you're looking for quick facts, code solutions, or in-depth analysis, Scira adapts to your needs.

Experience the future of search with Scira - where minimalism meets AI power to transform how you find and process information.

Morphic revolutionizes the way users interact with AI systems by dynamically generating user interfaces as part of its response mechanism. This open-source answer engine goes beyond traditional chatbot interactions by creating contextual UI elements that enhance the user experience.

Key capabilities:

• Generates custom UI components on-the-fly based on user queries
• Provides AI-powered responses with interactive elements
• Handles diverse query types from quick searches to complex analysis
• Creates visual summaries and interactive displays
• Supports both conversational and structured data interactions

The system excels at adapting its interface to match user needs, whether it's displaying comparative analyses, generating charts, or presenting document summaries. Its open-source nature allows for community contributions and customizations, making it a versatile tool for developers and end-users alike.

fullmoon is a revolutionary mobile app that brings the power of large language models to your pocket.

Here's what makes it stand out:

• Private and Local: Chat with AI models that run entirely on your device, ensuring your conversations remain private and secure.
• Offline Capability: Enjoy uninterrupted AI assistance even without an internet connection, perfect for travel or areas with poor connectivity.
• Optimized for Apple Silicon: Leveraging the power of Apple's custom chips, fullmoon delivers fast and efficient performance on iOS, iPadOS, macOS, and visionOS devices.
• Customizable Experience: Personalize your interaction by adjusting themes, fonts, and system prompts to suit your preferences.
• Integration with Apple Ecosystem: Use Shortcuts to incorporate AI-powered text generation into your workflows seamlessly.
• Open Source and Free: fullmoon is completely free to use and open source, allowing for transparency and community contributions.
• Multiple Model Support: Choose from different language models, including Llama-3.2-1B-Instruct and Llama-3.2-3B-Instruct, optimized for mobile devices.

Whether you're a writer seeking inspiration, a student looking for study assistance, or a professional needing quick information, fullmoon puts the power of AI in your hands, all while prioritizing your privacy and device performance.

llmchat.co is a powerful open-source research platform that puts privacy and user control first. Your chat history stays local, ensuring complete data privacy. The platform stands out with its comprehensive research capabilities, including Web Search, Pro Search, and Deep Research features that help you dive deeper into any topic.

The platform supports all major AI model providers and lets you bring your own API key (BYOK) for unlimited access. Notable features include:

• Privacy-first architecture with local data storage
• Extensive research tools for thorough investigation
• Full compatibility with mainstream AI models
• Open-source codebase for transparency and customization
• Upcoming MCP compatibility for expanded tool integration
• Built-in usage tracking for cost monitoring

Perfect for researchers, developers, and professionals who need powerful AI assistance while maintaining control over their data and workflows. Mobile version coming soon to extend accessibility.

VTChat is a production-ready, privacy-focused AI chat application delivering cutting-edge AI capabilities through a sophisticated dual-tier subscription system. Built with modern web technologies and a privacy-first architecture, VTChat offers advanced AI reasoning, document processing, web search integration, and comprehensive multi-AI provider support.

✨ Key Features:

• Premium AI Models (VT+ exclusive): Claude 4 Sonnet/Opus, GPT-4.1, O3/O3 Mini/O4 Mini, O1 Mini/Preview, Gemini 2.5 Pro, DeepSeek R1, Grok 3
• 9 Free AI Models: Gemini 2.0/2.5 Flash series + OpenRouter models (DeepSeek V3, Qwen3 14B)
• Multi-AI Provider Support: OpenAI, Anthropic, Google, Fireworks, Together AI, and xAI integration
• Document Processing (Free): Upload and analyze PDF, DOC, DOCX, TXT, MD files (up to 10MB) - available to all logged-in users
• Structured Output Extraction (Free): AI-powered JSON data extraction from documents - available to all logged-in users
• Thinking Mode (Free): Complete AI SDK reasoning tokens support with transparent thinking process - available to all logged-in users
• Mathematical Calculator (Free): Advanced functions including trigonometry, logarithms, and arithmetic - available to all users

🔒 Privacy-First Architecture:

• Local-First Storage: All chat data stored in browser's IndexedDB via Dexie.js
• Zero Server Storage: Conversations never leave the user's device
• Multi-User Isolation: Complete data separation on shared devices
• Enterprise-Grade Security: Secure authentication with Better Auth
• Privacy-Focused Security: Bot detection and secure authentication with Better Auth

Pixlie AI is an open-source knowledge graph engine that empowers you to unlock actionable insights from your data. By leveraging fast and cost-effective graph-based AI, you can connect your private data with public information to gain a deeper understanding of your business landscape.

Key features:

• Self-hosted and private: Run Pixlie AI on your own infrastructure for complete data control
• Multiple data formats: Ingest data from CSV, JSON, Markdown, and more
• Integrated web crawler: Enhance your data with public knowledge automatically
• Team collaboration: Share results securely with your team, on-premises or in the cloud
• Semantics management: Use the built-in admin UI to manage real-world semantics extracted from your data
• AI model integration: Leverage Anthropic's Claude API or local AI models for advanced analysis
• Entity and relationship extraction: Classify text and extract entities cost-effectively
• Knowledge graph enrichment: Continuously improve your data connections
• No-code graph queries: Explore your entire knowledge graph through an intuitive interface
• API access: Integrate Pixlie AI into your applications for seamless data querying

Experience the power of graph-based AI and transform your data into valuable insights with Pixlie AI. Get started today and unlock the full potential of your information ecosystem.