AI content research
Define keywords and Spanreedr searches YouTube, Substack, blogs, and news for the most relevant content. Get quality-scored results with summaries, source links, and publication dates — every section keeps its receipts.
AI-powered newsletter builder for solo founders
Write newsletters in minutes, not hours
Define your topics and Spanreedr finds the best content across YouTube, Substack, blogs, and news. It drafts newsletter sections in your voice — each one backed by the sources it came from, so you publish research you can stand behind in minutes.
Weekly Founder Insights
Researched · 3 sources
Your Notes
Voice Matched
SaaS Growth
Product Updates
Indie Hacking
Searches content from the platforms your audience already reads
YouTubeSubstackBlogsNews
How it works
From idea to inbox in three steps
Stop spending hours hunting for links and writing roundups. Spanreedr does the research so you can focus on what only you can say.
Step 01
Define your topics
Set up keywords and choose content sources. Spanreedr monitors YouTube, Substack, blogs, and news sites for content that matches your expertise.
Step 02
AI finds and writes the first draft
Spanreedr searches for the most relevant articles, videos, and posts on your topics. Then it drafts each section in your voice with its sources attached, ready for you to edit, sign off, and send.
Step 03
Drag, drop, and publish
Arrange AI-generated and human-written content blocks in a visual editor. Add personal annotations, review the preview, and hit publish.
Features
Research, write, and publish — all in one place
Go from a topic idea to a published newsletter without switching between tabs, tools, or platforms.
Drag-and-drop editor
Build newsletters with a visual canvas. Arrange AI-generated and human-written blocks side by side. Choose from YouTube roundups, link lists, Substack digests, summaries, polls, and more.
Voice matching
Upload writing samples and Spanreedr learns your tone, vocabulary, and style, so drafts sound like you — and get better with every issue you publish.
Newsletter dashboard
Track subscribers, open rates, and publishing history across all your newsletters. Manage drafts, schedule issues, and monitor delivery — all from one place.
Platform integrations
Cross-publish to Substack and Beehiiv. Share summaries on X and LinkedIn. Set up custom webhooks to push content anywhere your audience lives.
Developer & agent API
Full REST API, MCP server for AI agent workflows, and a command-line tool. Build automations, connect other tools, and manage your newsletter programmatically with scoped API keys.
Voice matching
AI that writes like you
Upload your past writing — blog posts, emails, social threads, previous newsletters — and Spanreedr learns what makes your voice yours. Every AI-generated section reflects your style, not a generic chatbot tone.
- Progressive learning — voice accuracy improves with every issue you edit and publish
- Confidence scoring — see how closely the AI matches your style as it learns
- Lessons learned feed — review exactly what patterns the system picks up from your edits
Your Voice Profile87% confidence
Tone
Conversational, direct, optimistic
Structure
Short paragraphs, bulleted takeaways
Vocabulary
Technical but approachable, avoids jargon
Punctuation
Em dashes, occasional ellipsis, no exclamation marks
Newsletter Preview
Researched · 3 sources
This week in SaaS: three founders shared lessons from hitting $10k MRR, and a new framework is challenging the status quo...
Adam's Notes
I actually tried this framework last week — here's what the articles don't tell you...
Written by you
My biggest takeaway this quarter: consistency beats perfection every single time...
Full transparency
Every claim shows its receipts
Every researched section carries the sources it's built from and a note that you reviewed it before sending. Add your own take inline. Readers get credibility they can click into — not a guess about what a machine wrote.
- Source receipts — every researched section links the articles, videos, and posts it's built from
- Inline annotations — add your personal commentary on AI-researched sections
- Reviewed by you — sections you sign off carry a human-review note readers trust
Integrations
Publish everywhere from one place
Cross-publish to Substack and Beehiiv. Share summaries on X and LinkedIn. Push content anywhere with custom webhooks.
SSubstackCross-publish
BBeehiivCross-publish
XX / TwitterCross-post
inLinkedInCross-post
{}WebhooksCustom
Pricing
Choose your plan once access opens up.
Join the waitlist now, then start on Free or upgrade to Pro after approval.
Free
Get started and publish your first newsletter
$0
- Newsletters: 1 newsletter
- Subscribers: 100 subscribers
- AI content searches: 20/month
- AI generations: 10/month
- Issues per month: 4 issues
- Voice matching: Basic
- Platform integrations: No
- API & developer tools: No
- Priority support: Community
Most popular
Pro
More newsletters, more searches, and platform integrations
$19/month
- Newsletters: Up to 10 newsletters
- Subscribers: 10k subscribers
- AI content searches: Unlimited
- AI generations: Unlimited
- Issues per month: Unlimited
- Voice matching: Advanced
- Platform integrations: Substack, Beehiiv, X, LinkedIn
- API & developer tools: REST API, MCP, CLI
- Priority support: Priority email
FAQ
Frequently asked questions
Everything you need to know about Spanreedr and how it works.
Send your first issue this week
Solo founders use Spanreedr to publish research-backed newsletters every week — without spending hours on each one. Your first issue takes minutes.
Join the Waitlist