Sidenote

Web · Extension · paid plans from £1.20/mo

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Sidenote is ranked #12 of 35 in AI summarizers on Freedom251. It runs on Browser extension, Web. There is a free plan. A free trial is offered. Paid plans start at £1.20/mo.

Sidenote plans and pricing

All plans

Free Free forever 3 documents/month · 5 MB/document · 10 summaries/month · 10 explanations/month · 3 glossary builds/month · 10 chat turns/month · no collections or Confluence space indexing getsidenote.app · 29 Sept 2026

Pro £10/mo monthly 25 documents/month · 20 MB/document · 75 summaries/month · 70 explanations/month · 15 glossary builds/month · 35 chat turns/month · collections up to 5 documents getsidenote.app · 29 Sept 2026

Team (annual billing) £14.40/yr billed annually Pro-level caps per member · shared team collections · SAML SSO with domain auto-join · team owners/admins get Confluence indexing at 500 pages/month getsidenote.app · 29 Sept 2026

Team £18/mo monthly Pro-level caps per member · shared team collections · SAML SSO with domain auto-join · team owners/admins get Confluence indexing at 500 pages/month getsidenote.app · 29 Sept 2026

Pro+ £20/mo monthly 50 documents/month · 40 MB/document · 150 summaries/month · 140 explanations/month · 30 glossary builds/month · 50 chat turns/month · collections up to 10 documents · Confluence indexing 200 pages/month getsidenote.app · 29 Sept 2026

Pro Max £100/mo monthly 250 documents/month · 75 MB/document · 750 summaries/month · 700 explanations/month · 150 glossary builds/month · 250 chat turns/month · collections up to 25 documents · Confluence indexing 500 pages/month getsidenote.app · 29 Sept 2026

Compared on AI summarizers

Free plan: Yes
Document upload: Yes
Webpage summaries: Yes
Transcript summaries: Yes
Summary length control: short
Export formats: markdown

Best Sidenote alternatives

See all 20

Two bars Lemora Free tier No. 1Free6.7 Two bars AskSia Free tier No. 2Free6.6 Two bars Briefy Free tier No. 3$7.49/mo6.6 One bar Grasp Free tier No. 4$7.99/mo6.5 One bar smry Free tier No. 5$3/mo6.5 One bar Summify Free tier No. 6$4.99/mo6.5

The record

What it does: Sidenote is an AI reading assistant that answers questions about documents in the browser and shows where each answer came from.
Cited answers: Answers cite source passages, and clicking a citation scrolls to and highlights the passage in the page.
Document tools: Features include summaries, explanations, glossaries, multi-document collections, document search, notes, highlights, tags, and starred documents.
File support: Sidenote reads browser-rendered PDFs, including scanned PDFs with OCR, and accepts PDF, DOCX, PPTX, TXT, MD, MDX, and RTF uploads.
Integrations: Dedicated integrations include Confluence, Notion, Google Docs, Slack canvases, SharePoint, and OneDrive.
Browser availability: The site lists Chrome, Edge, and Firefox extensions, with Opera described as coming soon.
Trial: The 7-day Pro trial requires no card and has limits including 10 documents, 20 summaries, and 10 chat turns.
Privacy: The maker says user content is never used to train AI models and its AI providers use no-training defaults on the API tiers used.
Data residency: Documents are stored in Supabase in the UK eu-west-2 London region, encrypted at rest and isolated per account with row-level security.
Retention: Users can choose Store retention while the account is open or Discard, which purges a document within 24 hours; users can also delete library documents at any time.
Compliance limit: Sidenote says it is not yet SOC 2 certified and that formal attestation is on its roadmap.
Who it is for: The maker describes use cases for engineering, product, customer success, legal and operations, and research teams.
Support: The maker lists support by email at [email protected] and says it is supported by its solo developer, Lewis Hadden.
Headquarters: Whittlesey, United Kingdom
Price from: £1.20/mo

Where it ranks on Freedom251

Best AI Summarizers in 2026#12 of 35

Is Sidenote yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Sidenote

Sources

getsidenote.app/about· checked 29 Sept 2026
getsidenote.app/features· checked 29 Sept 2026
getsidenote.app· checked 29 Sept 2026
getsidenote.app/pricing· checked 29 Sept 2026
getsidenote.app/security-compliance· checked 29 Sept 2026