Turn any claim into a structured evidence card. Add sources. AI scores confidence. Share proof.
Each card contains: your claim, linked sources, an AI-generated confidence score, and rationale.
Write a clear, specific statement you want to back up.
Link to sources you would cite publicly.
AI auto-classifies source quality.AI analyzes your sources and scores confidence automatically.
Choose visibility: Public, Unlisted, or Private.
"Based on a meta-analysis of 49 prospective studies with 266,939 participants. Effect sizes were consistent across age groups and geographic regions, though most studies relied on self-reported exercise data."
thelancet.com
Peer ReviewedThe Lancet Psychiatry, 2018
Built for: debates, documentation, transparency
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Everything you need to know about BackedBy
BackedBy is a platform that helps you turn any claim into a structured evidence card. You add sources, AI scores confidence, and you share proof. It's designed to stop arguments in circles by providing verifiable evidence for claims.
Creating an evidence card takes under 60 seconds. First, state your claim (max 100 characters). Then add sources you would cite publicly. Our AI analyzes your sources and assigns a confidence score. Finally, choose visibility (Public, Unlisted, or Private) and publish.
No account is required to create evidence cards. You can create and share cards without signing in. Sign in only if you want to vote on cards, save cards, or manage your own cards.
Primary sources are original research, official documents, or direct evidence. Secondary sources are analysis, reporting, or interpretation of primary sources. Opinion/editorial and anecdotal sources are also supported but labeled accordingly.
Confidence level is AI-assessed based on source quality, bias indicators, and how well the evidence supports the claim. High confidence (70-100%) means strong, well-sourced evidence. Medium (40-69%) means decent evidence with some caveats. Low (0-39%) means limited, biased, or poorly sourced evidence.
Each card gets a unique short link (backedby.app/c/CODE). You can copy the link, copy embed code for websites, or copy a summary. Cards automatically generate OpenGraph images for rich previews on Twitter, LinkedIn, Reddit, Discord, and Notion.
Create your first evidence card in under 60 seconds.
Sign in only if you want to vote or save cards.
