Tabstack

Tabstack serves developers and teams who are running their own models and need to integrate web research, extraction, or automation capabilities into their applications. It is for those who prioritize receiving a finished, cited answer over managing complex search, parsing, and citation logic themselves.

Tabstack offers a freemium model with a free tier providing 10,000 credits. Paid tiers start at $10 per month for 100,000 credits, with higher tiers offering more credits and increased request limits. Overage credits are charged per 1,000 credits, with the rate decreasing at higher tiers.

• Never trained on customer payloads, with detailed data collection opt-in.
• Private by default, offering transparency on data handling and processing.
• Built by Mozilla, leveraging their expertise in web technologies.
• Completes the answer-building workflow internally, including query planning, retrieval, gap detection, reconciliation, and claim-level citation.
• Offers an open-source automation engine (Pilo) for self-hosted solutions requiring browser control.
• Returns cited answers, clean text, matching JSON, or completed public web tasks from live sources in one API call.
• Offers an open-source automation engine (Pilo) for self-hosted solutions requiring browser control.

• The company is actively hiring for various senior and staff-level roles across different departments like Core Services, Firefox, New Products, Infrastructure, and Thunderbird, indicating growth and expansion in diverse areas.
• Recent blog posts focus on topics such as data privacy (PII redaction, private by default), production readiness for AI features, and different approaches to web research (search, agentic search, Research API), suggesting an emphasis on practical application and security for AI models.
• Github activity shows recent releases and ongoing contributions, with the latest release being 'v2.8.6' on August 11, 2026, indicating continuous development and maintenance.
• Twitter/X activity discusses website rendering/optimization, AI agents for search/web automation/data extraction, and AI agent browsing infrastructure, highlighting engagement with current trends in AI and web technology.
• New integrations are being developed, including LangChain, Vercel AI SDK, Mastra, LlamaIndex, Eve, and Hermes Agent, showing efforts to broaden its ecosystem compatibility.
• Recent blog posts cover topics like "Redact PII before your model searches the web" and "What 'private by default' means for a managed web API."
• The latest release on GitHub was v2.8.6 on August 11, 2026.
• There are open roles for Staff Data Scientist, Ads and Senior Software Engineer, Add-Ons among others.
• Twitter/X mentions AI agents for research and data extraction as a recent topic.

Search gives your model sources. It still has to build the answer.

A managed web API for models that don't come with the web.

10,000 FREE CREDITS

• NEVER TRAINED ON
• PRIVATE BY DEFAULT
• BUILT BY MOZILLA

1. —Redact PII before your model searches the web
2. —The production-readiness checklist for current-answer features
3. —The 22-line demo and everything it was missing
4. —Build a 20-question evaluation set for a live-web feature
5. —When should you use search, agentic search, a Research API, or build the loop yourself?
6. —What "private by default" means for a managed web API
7. —Trace a question from request to source-backed answer
8. —What makes a citation useful in an AI-generated answer?
9. —Where model-operated web research breaks
10. —Add current, cited answers to your model application without touching the model