Turn any claim into a structured evidence card. Add sources. Set confidence. Share proof.
Each card contains: your claim, linked sources, your rationale, and a confidence level.
Write a clear, specific statement you want to back up.
Link to sources you would cite publicly.
Primary vs Secondary?Be honest about certainty. Transparency builds trust.
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
Back up wellness advice with studies
"Vitamin D reduces cold risk by 12%"
Show where donations actually go
"We spend 90% on programs"
Prove your comparisons with data
"Battery lasts 18 hours in testing"
Cite sources, not vibes
"Minimum wage impacts are mixed"
Everything you need to know about BackedBy
BackedBy is a platform that helps you turn any claim into a structured evidence card. You can add sources, set confidence levels, and 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. Set your confidence level (author-reported, not independently verified). 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 author-reported and represents how certain the claim author is about their claim based on the evidence provided. It's not independently verified. High confidence (70-100%) means strong evidence with multiple sources. Medium (40-69%) means good evidence with caveats. Low (0-39%) means limited or conflicting 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.
