How to Build an AI Research Stack for Under $50/Month

The AI tools available for $50/month in 2026 would have cost a research team of 3 people in 2020. The combination of language models, real-time web search, and document analysis tools available at consumer pricing is extraordinary. Here’s the exact stack that makes the most of that $50.

The Core Stack: Three Tiers

Tier 1: The Brain ($20/month) — Claude Pro

Claude Pro from Anthropic: $20/month

Claude Pro is the foundation. At $20/month, you get:

• Claude Sonnet and Opus model access (state-of-the-art reasoning)
• 200,000 token context window — long enough to analyze an entire 10-K annual report in one pass
• Claude Projects — custom instructions and file context that persist across conversations
• Priority access during high-traffic periods

Why Claude over ChatGPT Plus (also $20)? Claude’s context window is substantially larger (200k vs. GPT-4’s 128k), and Claude is generally better for long-document analysis — exactly what research-heavy users need. For stock research, the ability to paste an entire 10-K and get a structured analysis is invaluable.

Best uses for research:

• Full 10-K / S-1 analysis in one shot
• Earnings call transcript analysis (paste the full transcript)
• Comparing multiple SEC filings for a company over time
• Synthesizing research reports
• Writing first drafts of analysis with your notes as input

Tier 2: Real-Time Intelligence ($20/month) — Perplexity Pro

Perplexity Pro: $20/month

Perplexity is AI-powered search with citations. Where Claude is best for analyzing documents you provide, Perplexity is best for real-time web research with verifiable sources.

Perplexity Pro gives you:

• Access to GPT-4o, Claude Opus, and Mistral Large for different queries
• Real-time web search with source citations
• Focus modes: Academic, Web, YouTube, Reddit, Wolfram Alpha
• Pro Search with deeper multi-step web research

Best uses for research:

• “What’s happened with [company] in the last 30 days?” — real-time news synthesis
• Competitor landscape mapping (“What are [company]’s top 5 competitors and their key metrics?”)
• Industry trend research with source links to verify
• Earnings call key quotes and financial results (for recent releases)

Tier 3: Knowledge Management ($0-10/month) — Readwise + Obsidian

Readwise Reader: $7.99/month (or free tier)

Readwise Reader is a read-later app that integrates AI. Import articles, PDFs, newsletters, and research. Highlights sync to Obsidian or Notion. The AI can summarize documents and answer questions about them.

This is the “where I put things I find” layer. SEC filings, research reports, newsletter issues, and articles all go into Readwise. You search it later with AI assistance.

Obsidian: Free

Obsidian is a local-first note-taking app with a knowledge graph. Your notes live as plain text Markdown files on your computer — no vendor lock-in. Build a “second brain” that connects your research notes, stock theses, and analysis.

Obsidian is where you maintain your investment theses over time. A note per company, with links to related notes (competitors, sector trends, related companies). Over 6-12 months, this becomes a genuinely valuable knowledge base.

The Full Stack at $50/Month

The Research Workflow: Putting It Together

New Stock Research (45 minutes → 10 minutes)

1. Perplexity: “Give me an overview of [TICKER]: business model, recent news, analyst sentiment, key metrics.” (5 min)
2. SEC EDGAR: Download most recent 10-K PDF. Drop into Claude. “Analyze this 10-K. Extract revenue trend, gross margins, key risks, competitive advantages, cash position.” (10 min)
3. Claude: “Based on the 10-K and this [Perplexity summary], give me a 3-paragraph bull and bear thesis. What are the 2 most important questions to answer before investing?” (5 min)
4. Obsidian: Paste synthesis into your [TICKER] note. Tag with sector, risk level, watch status. (5 min)

Ongoing Monitoring

• Perplexity: Weekly query on your watchlist names for news updates
• Readwise: Save relevant articles and earnings releases automatically
• Claude: Paste earnings call transcripts for structured analysis each quarter

Optional Add-Ons

If you have budget beyond $50:

• ChatGPT Plus ($20) — Adds code interpreter for quantitative analysis and DALL-E for charts/visualizations
• Koyfin ($25/month) — Best free-to-affordable financial data platform with screener
• Beehiiv ($0) — Free for building a newsletter to share your research

For more AI tools and automation guides, explore our AI automation series. Access our curated space investing research tools at orbitalinvestor.com/products. Subscribe free at orbitalinvestor.com/signup.