Perplexity
AI-powered answer engine that searches the live web and cites every source
AI search engine for peer-reviewed research across 200M+ scientific papers
Consensus is an AI academic search engine that queries 200M+ peer-reviewed papers and synthesizes findings via a "Consensus Meter" showing yes/no/possibly across analyzed studies. The free tier includes unlimited paper searches plus 3 Deep Searches per month; Pro costs $10/mo (billed annually) or $15/mo monthly. Best for researchers, students, and clinicians who need evidence-backed answers fast without manual literature review.
Consensus is an AI-powered academic search engine built on a corpus of over 220 million peer-reviewed scientific papers. Unlike general-purpose AI chatbots that synthesize from training data, Consensus runs every query directly against its indexed literature using a hybrid of semantic search (vector embeddings) and keyword search (BM25), then surfaces the papers most relevant to your specific research question. Every claim it returns is tied to a citable source paper, not generated text.
The platform’s signature feature is the Consensus Meter: a visual indicator that aggregates findings from analyzed studies and shows a yes/no/possibly breakdown in seconds, reranked by citation count, study design quality, and journal reputation. Deeper features include Deep Search, which automates full search strategy execution across up to 1,000 papers per query, and Study Snapshots, which extract structured data — methods, outcomes, populations, sample sizes — from individual papers. Medical Mode (launched October 2025) restricts results to clinical guidelines and high-impact medical journals, while Scholar Agent coordinates multi-agent workflows for complex research tasks requiring planning, retrieval, reading, and synthesis in sequence.
Consensus targets anyone who needs evidence-backed answers faster than manual literature search allows. The free tier is genuinely usable for occasional research needs without a subscription, while Pro suits regular users doing ongoing literature work. The Deep tier is designed for power users who run frequent systematic reviews or need Medical Mode access.
Specific user profiles:
Starting price: $10/mo · Free tier: yes · Model: freemium
Price history tracked from June 2026
| Plan | Price | Includes |
|---|---|---|
| Free | Free | Unlimited paper searches across 200M+ papers · 3 Deep Searches/month · 10 Study Snapshots/month · 15 Pro AI messages/month |
| Pro | $15/mo | $10/mo billed annually ($120/yr) · Unlimited Pro Search · 15 Deep Searches/month · Unlimited Study Snapshots · 40% student discount available |
| Deep | $65/mo | $45/mo billed annually ($540/yr) · 200 Deep Searches/month · Medical Mode access · Scholar Agent access · Priority support |
| Enterprise | Contact | 200+ users · Centralized billing · University library integrations · Custom SLA |
| Pros | Cons |
|---|---|
| Free tier includes unlimited paper searches — no hard search cap | Coverage is limited to indexed academic papers — no grey literature or preprints by default |
| Consensus Meter reduces hundreds of papers to a visual signal in seconds | Large price jump from Pro ($15/mo) to Deep ($65/mo) for moderate power users |
| Medical Mode and Scholar Agent meaningfully differentiate the Deep tier | No API access, limiting programmatic integration into research pipelines |
| 40% student discount and 25% clinician discount reduce effective cost | Deep Search credits reset monthly with no rollover |
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Yes. The free tier includes unlimited paper searches across 200M+ peer-reviewed articles, plus 3 Deep Searches per month, 10 Study Snapshots, and 15 Pro AI messages. No credit card is required.
Consensus Pro costs $15/month on a monthly billing cycle, or $10/month when billed annually ($120/year). A 40% student discount is available with a verified academic email, bringing the annual rate to approximately $6/month.
The Consensus Meter is a visual indicator that aggregates findings from analyzed papers and shows a yes/no/possibly breakdown for a given research question. Papers are reranked by citation count, study design, and journal reputation before the calculation.
Deep Search is an automated literature review feature that expands a query across up to 1,000 papers, extracts structured data, and synthesizes findings. Free users get 3 Deep Searches per month; Pro users get 15; Deep plan users get 200.
Yes. Medical Mode, available on the Deep plan, filters results to approximately 50,000 clinical guidelines and 8 million articles from the top 1,000 medical journals. A 25% clinician discount is available with verified NPI.
Scholar Agent is a multi-agent system introduced in 2025 that automates complex scientific research workflows. Specialized sub-agents handle planning, searching, reading, and analysis tasks in sequence.
As of 2026, Consensus indexes over 220 million scientific papers from peer-reviewed sources, with partnerships across 170+ university libraries.