Expert Knowledge In.
Publishable Content Out.
substr.io structures your subject matter experts' input before AI drafts a word — so technical content earns trust with niche audiences, not just clicks.
Free to try • No long-term commitment
More AI Content.
Same Credibility Problem.
For niche and technical audiences, generic AI output doesn't just underperform — it actively erodes trust.
AI can mimic your tone. It cannot replicate 12 years of your engineer's production experience. Technical audiences notice immediately.
Most tools generate first, ask experts second. Review cycles exist to fix what AI got wrong — not to refine ideas.
Draft quality varies by writer, vendor, and how much time the SME had that week. There is no repeatable standard.
Generic AI Tools
- Expert as reviewer, not source
- Voice drifts across long-form content
- Review cycles fix what AI got wrong
- Shallow technical depth
- Quality varies by writer and vendor
- Expert input structured before drafting
- Voice mapped from verified expert sources
- Review cycles refine, not repair
- Built for accuracy-critical content
- Consistent quality at any scale
Built for Content
That Has to Be Right.
Every feature is designed around one principle: expert knowledge comes first, AI drafting comes second.
Expert Extraction
Get the Right Knowledge Out.
Structured prompts guide SMEs through exactly what each article needs — in 20–30 minutes, not a two-hour interview.
Knowledge Grounding
No Hallucination by Design.
AI only drafts from confirmed, mapped expert input. Every claim has a source. Every source is attached before drafting begins.
Voice Fidelity
Consistent Across Every Writer.
Brand voice is configured at project setup and applied at the drafting stage. Every writer produces content that sounds like your brand.
Source-Linked Review
Reviewers See the Evidence.
Every AI-generated claim is traceable back to its expert source. SMEs review with full context — not just the draft.
Technical Depth
Accurate, Not Just Readable.
Built for content that needs to hold up under expert scrutiny. Jargon is used where it earns trust, not where it obscures.
Scalable Consistency
Same Quality Bar. Every Time.
From one article to a hundred, the same structured process applies. Quality stops varying by writer or vendor.
Experts First. AI Second.
Always.
A controlled workflow that grounds AI output in verified expert input before drafting begins.
Strategic Brief
Competitive analysis produces a defined angle and content focus before a single word is written.
Structured Outline
Each section includes targeted prompts to extract expert input — including interview questions for your SMEs.
Expert Source Attachment
Transcripts, notes, or internal documentation are attached per article — grounding the draft in real knowledge.
Knowledge Mapping
Expert inputs are mapped to outline sections and explicitly confirmed before drafting begins.
Voice-Aware Drafting
Drafts are generated from confirmed sources, aligned to your brand voice. AI writes from evidence, not assumption.
Controlled Review
Writers edit directly. SMEs provide comment-only feedback with source context. Review refines, not repairs.
For Teams Where Accuracy Isn't Optional.
substr.io is built for organizations where content has to hold up to expert scrutiny.
B2B Tech Content Teams
Marketing teams shipping whitepapers, technical blogs, and case studies at scale — where every claim has to be defensible.
Technical Writers
Writers spending hours extracting and validating SME input before a draft can begin. substr.io makes that process repeatable.
Specialist Agencies
Agencies delivering expert-driven content in cybersecurity, DevOps, fintech, or biotech — where generic output kills credibility.
Product Marketing
PMMs who need technical accuracy without pulling engineers off real work. Structured expert input without the scheduling overhead.
Priced for Content Teams.
Choose the volume that fits your team. Every plan includes the full expert-first workflow.
Solo Creator
- ~4 articles per month
- 1,500–1,700 words each
- Full 6-step workflow
- Voice profile setup
- Expert source attachment
- Standard support
Business
- ~12 articles per month
- 1,500–1,700 words each
- Full 6-step workflow
- Voice profile setup
- Expert source attachment
- Priority support
Enterprise
- Custom article volume
- Custom agents & models
- Custom workflow configuration
- Dedicated onboarding
- SLA & dedicated support
- Team seats included
Free trial available • No long-term commitment • Cancel anytime
Questions & Answers
Most AI writing tools generate content first and ask for expert review later. substr.io structures expert input before any drafting begins — so the AI writes from verified knowledge, not guesses. Review cycles are for refinement, not repair.
Long-form technical content: whitepapers, technical blog posts, case studies, product guides, and thought leadership for niche and technical audiences. If your content needs to hold up under expert scrutiny, substr.io is built for it.
Much less than a traditional interview. Structured prompts extract exactly what's needed for each article section. Most SMEs contribute in 20–30 minutes per article — compared to hours of unstructured back-and-forth.
Brand voice is configured at project setup and applied at the drafting stage. Every writer and every article produces content that sounds like your brand — not like the individual who wrote it or the AI model that drafted it.
Yes. substr.io is designed to slot into existing processes. You can attach transcripts, briefs, or internal documentation you already have. It doesn't require starting from scratch — it makes your existing inputs more useful.
Stop Publishing Content Your Experts Don't Recognize.
Get early access to substr.io and make your experts' knowledge publishable at scale.
Get Early AccessFree to try • No long-term commitment