[00:00]// Fact check

The Best AI Fact Checkers in 2026 (Free Options First)

Published 2 July 2026 · Updated 2 July 2026

The best free AI fact checkers in 2026 are Google Fact Check Explorer (no sign-up, searches 250,000+ professional fact-checks), Facticity AI (free daily checks of text and video claims) and the InVID/WeVerify plugin (free image and video verification). For written drafts, the strongest paid option is Originality.ai; for live audio, the options are Factiverse (enterprise) and SpeekSearch (consumer, which we build). This guide covers what each actually does, what it costs, and — because most fact-checker listicles skip this — which famous tools are now dead.

One ground rule before the list: no AI fact checker should be the final word. The independent numbers (covered in the limitations section) are rough enough that every tool here is best used as a first-pass filter — a way to find the evidence fast, not a verdict machine.

How we chose — and why half the usual suspects are missing

We checked every tool on this page directly on 2 July 2026 — pricing pages, live sites, APIs. That matters more than usual in this category, because the fact-checking ecosystem is shrinking: the Duke Reporters’ Lab census counted 437 active fact-checking projects as of mid-2026, down from 441 at the end of 2025, with 30+ closures against just 10 launches in 2025 — the first year closures beat openings roughly three to one. Several tools that still headline competing listicles are dead or sold off; they get their own graveyard section below so you don’t waste an afternoon on a broken sign-up form.

Ordering is free-first: genuinely free tools, then the free-tier workflow, then paid and enterprise. Prices are USD as vendors bill, with approximate AUD alongside.

1. Google Fact Check Explorer — best free option, no sign-up

Google Fact Check Explorer is the tool to open first, because it answers a different question from every AI checker on this list: has a professional human fact-checker already covered this claim?It searches an index of 250,000+ fact-checks tagged by organisations like PolitiFact, AAP FactCheck and Full Fact, by keyword or by image. It’s completely free, needs no account, and a free API key covers programmatic use.

The honest caveats: it does not verify new claims itself — if nobody has fact-checked the claim yet, you get nothing — and its coverage depends on an ecosystem that is thinning (see the Duke census above). Worth knowing: Google killed the fact-check snippet in Search results in June 2025, calling it no longer significant. The Explorer tool and API remain live and supported as of July 2026, but that retreat suggests declining investment — use it while it lasts, and don’t build a workflow that depends on it existing forever.

2. Facticity AI — best free AI fact checker for new claims

Facticity AIis the closest thing to a purpose-built consumer AI fact checker with a real free tier. Paste a paragraph and it splits out the individual claims and labels each True, False or Unverifiable with sources; it also checks YouTube, TikTok and Instagram video links and podcast audio, and a Chrome extension checks claims as you browse. It was used in near-real-time during the US presidential debates and made TIME’s Best Inventions of 2024.

Pricing needs a hedge: the free tier is confirmed on the official site (sign-up required), and third-party reporting puts it at roughly 15 credits a day — around three fact-checks — with a Basic plan from about US$10/month (~A$15). But Facticity’s own pricing page wasn’t publicly reachable when we checked on 2 July 2026, so verify the paid tiers in-app before budgeting. The company claims 92% accuracy on its own benchmarks — treat that as a vendor claim, not an independent finding, and note that even the vendor concedes unverifiable claims remain hard.

3. Perplexity — best free workflow, with a serious caveat

Perplexityisn’t a fact checker — it’s a general answer engine with live web search and citations — but plenty of people use the free tier as one, and for “is this claim supported, and by whom?” it’s genuinely fast. The free tier covers unlimited basic searches and roughly five Pro searches a day (a limit Perplexity adjusts quietly); Pro is US$20/month (~A$30).

Here’s the caveat, and it’s load-bearing. When Columbia’s Tow Center tested eight AI search engines on citation accuracy (CJR, March 2025), Perplexity answered 37% of queries incorrectly — and that was the bestresult of the eight. The dominant failure mode is misattribution: the fact is right but the cited source doesn’t actually say it — a real URL, wrong content — which is invisible unless you click through. The same study found premium models were more confidently wrong than free ones. Verdict: a research accelerant, never the final word. Citations are a verification mechanism, not a guarantee.

4. InVID / WeVerify plugin — best free tool for images and video

Half of what people actually want to fact-check isn’t a sentence — it’s a photo or a clip. The InVID/WeVerify verification plugin is the free pick there: reverse image search, video keyframe analysis, metadata inspection, deepfake and voice-clone detection, and disinformation archiving, in eight languages. Maintained by AFP Medialab, it shipped v0.90 in May 2026 — making it one of the few genuinely active free tools in this whole space. Some advanced detectors are gated to accredited journalists and researchers, but the core toolkit is open to everyone. It won’t check text claims; pair it with one of the tools above.

5. SpeekSearch — fact-checking a live conversation

Full disclosure: SpeekSearch is our product, and it fills the gap every tool above shares — they all assume the claim is sitting in front of you as text or a link. If you host a podcast, run interviews or sit in debates, claims fly past as speech, and by the time you’ve typed one into a checker the moment to challenge it is gone.

SpeekSearch works differently: hit record in the browser and it transcribes the conversation in real time — through your mic, so no bot joins any call and it works for in-person conversations too — and surfaces research cards for the people, places, products and topics as they’re mentioned. Each card carries Pin, Ask AI, Google and YouTube actions, so when a guest says “the Tow Center found AI search engines botch most citations,” the background is one click away while they’re still talking:

Being honest about the fit, in both directions:

That first con is deliberate. Given the discernment research below — AI verdicts can make people worseat judging claims — we think surfacing sources fast and leaving the judgement to you is the defensible design for live conversation. If you want a tool that stamps TRUE or FALSE on things, SpeekSearch isn’t it. If you want to be the person in the room who can actually check the claim before the topic changes — that’s the copilot we built.

6. Originality.ai Fact Checking Aid — best paid option for writers and editors

Originality.ai’s Fact Checking Aid is the strongest pick for editorial teams checking written drafts before publication. It works sentence-by-sentence, retrieves sources, and labels claims “Potentially True” or “Potentially False” with at least one source URL per fact — bundled with the AI-content and plagiarism detection the product is better known for. Limits to know up front: written content only, English only, and it explicitly excludes opinions and political content.

Pricing (checked on the official page, 2 July 2026): pay-as-you-go at US$30 (~A$45) one-time for 3,000 credits (1 credit = 100 words, expiring in two years); Pro at US$14.95/month, or US$12.95/month (~A$20) billed annually, with 2,000 credits a month; Enterprise from US$136.58/month annual. Fact-checking is included in every plan, but there’s no free tier for it. The vendor’s own 2025 study claims 86.69% accuracy — self-published, so treat accordingly — and, unusually and to its credit, the company itself says the tool “should be used as a fact checking aid and not viewed as the final source of truth.” The name isn’t “Fact Checker” — it’s Fact Checking Aid. Believe them.

7. Factiverse — live fact-checking for newsrooms

Factiverse, a Norwegian startup, is the enterprise answer to live fact-checking: its Gather product extracts checkable claims from debates, speeches and interviews in 110+ languages, near-real-time. It ran during the 2024 US presidential debates and Danish EU-election debates, and published a Hungarian-election debate report ahead of April 2026 — so it’s demonstrably still operating. There’s also an AI Editor for written text and a searchable fact-check database.

The catch for individuals: no public pricing — the pricing URL returned a 404 when we checked, and access is book-a-call with custom per-organisation limits. The site also still advertises a “$5/month GPT plugin” even though ChatGPT plugins were deprecated back in 2024 — stale copy that, along with its drift toward government and enterprise risk work, tells you where the focus is. For a newsroom, shortlist it. For everyone else, it’s a mention, not a pick.

8. Full Fact AI — for fact-checking organisations

Full Fact AI, built by the UK charity Full Fact, does claim detection and monitoring across text, video, audio and social media — including alerts when known false claims resurface — and is used by 45+ organisations in 30 countries, in English, French and Arabic. Notably, it routes claims to human fact-checkers rather than issuing AI verdicts, which is exactly the expert consensus on how this technology should be used: AI finds and triages, humans adjudicate. Pricing is request-a-demo only, so it earns its place here as the credible professional option rather than something you’ll sign up for this afternoon.

9. If you’re technical: Loki (OpenFactVerification)

Loki is an open-source pipeline (1.2k GitHub stars) that splits text into claims, judges check-worthiness, generates search queries, crawls evidence and issues verdicts. The code is free, but running it requires your own paid OpenAI and Serper API keys — so it’s not actually $0 — and the last release was v0.0.2 in April 2024, with minimal activity since. One for tinkerers who want to see how the sausage is made, not a daily driver.

The graveyard: tools other lists still recommend

Most competing “best AI fact checker” roundups were written in 2024 and never re-verified. Save yourself the dead ends:

• ClaimBuster — effectively dead.The famous free claim-spotting API from UT Arlington now redirects to a default “Welcome to nginx!” page with an invalid SSL certificate, and its API endpoints 404 (verified firsthand, 2 July 2026). There’s no official shutdown notice, so there’s a small chance it’s a botched server migration — but as it stands, it’s unusable.
• Logically — gone as a fact-checker. The UK firm, which raised roughly £30M, filed for administration in July 2025 after losing its TikTok and Meta contracts; the assets were sold and the remnant pivoted to government and enterprise “narrative intelligence.”
• Meta’s third-party fact-checking programme (US) — ended early 2025, replaced by Community Notes, defunding a large chunk of the professional ecosystem.
• The Washington Post Fact Checker column — ended after roughly 20 years, following Glenn Kessler’s buyout.

The pattern matters: the human fact-checking layer that tools like Google Fact Check Explorer depend on is contracting, which means existing fact-check databases will get staler over time. All the more reason to click through to primary sources yourself.

The honest limitations of AI fact-checking

A fact-check listicle that overclaims is its own punchline, so here’s the independent research, plainly:

• Chatbots repeat falsehoods at scale. NewsGuard’s audits found the leading chatbots — including ChatGPT, Gemini, Perplexity and Grok — repeated provably false news claims 35% of the time as of late 2025, nearly double the year before; the January 2026 quarterly still showed above 28%.
• Refusals went to zero; accuracy didn’t follow. In 2024, chatbots declined about 31% of hard prompts. By 2025 they answered everything — so more answers contained falsehoods. Confidence went up, not correctness.
• Nearly half of AI news answers have a significant problem. The EBU/BBC News Integrity study (October 2025; 2,709 answers, four assistants, 18 countries, 14 languages) found 45% had at least one significant issue, 31% had serious sourcing failures, and 20% contained major accuracy errors including hallucinated details. Gemini fared worst, with issues in 76% of responses.
• The citation paradox. Per the Tow Center study above, the dominant AI failure is a reallink whose content doesn’t support the claim — the hardest error for a reader to catch. Grok-3 served broken 404 links 154 times in 200 tests.
• AI verdicts can make you worse at judging news. A peer-reviewed, preregistered PNAS experiment (DeVerna et al., December 2024) found ChatGPT fact-checks decreaseddiscernment: people believed true headlines less when the AI wrongly labelled them false, and believed dubious ones more when it hedged. Even accurate AI labels didn’t reliably help.
• Vendor accuracy numbers are vendor benchmarks. Originality’s 86.69% and Facticity’s 92% are self-run studies. Even at face value, 87–92% means roughly one verdict in ten is wrong — fine for triage, unacceptable as the sole gate before you publish or repeat a claim.
• Structural limits nobody escapes:AI checkers verify against what’s indexed online, so they struggle with brand-new claims, non-English content (Originality is English-only), statistics, satire and genuinely contested claims. The professional consensus — Full Fact, Factiverse, the IFCN orgs — is AI for claim detection and triage, humans for verdicts.

FAQ

Every tool, price and status on this page was checked directly on 2 July 2026 — including the dead ones. Vendor prices are USD as billed, with approximate AUD conversions; Facticity’s paid tiers and free-tier limits are third-party reported and flagged as such. Accuracy figures attributed to vendors are self-reported benchmarks; independent figures are linked to CJR, NewsGuard, the EBU/BBC study and PNAS above. We build SpeekSearch, and we’ve flagged that wherever it’s relevant. This page will be updated as the ecosystem shifts.