Tortoise Media
Tortoise Media is a UK subscription-based digital news publisher founded in 2018, operating the Daily Sensemaker newsletter, investigative podcasts, member-exclusive ThinkIn events, and recurring data journalism projects. In April 2025 it acquired The Observer (the world's oldest Sunday newspaper) for £25M, integrating print and digital newsroom operations.
- Company typePrivate
- Founded2018
- HeadquartersLondon, United Kingdom
- Headcount51–100
- GTM typeB2C
- OfferingDigital Commerce or Content
What Tortoise Media does
Tortoise Media is a UK-based, subscription-supported digital news organization founded in 2018 that operates a slow-news platform combining a daily newsletter (Daily Sensemaker), an investigative podcast portfolio (The Slow Newscast, The News Meeting, We Have Notes), member-exclusive ThinkIn discussion events, and a suite of recurring data journalism products. Its technology stack includes iOS/Android mobile apps, third-party audio distribution, and interactive data tools — the Global AI Index (83 countries, 122 indicators), Westminster Accounts (£183M+ in tracked UK political funding, built jointly with Sky News), Hot Air (274 actors, 129,334 posts of tracked climate misinformation across TikTok, X, YouTube, and news sites), and Peer Review (House of Lords behavioral archetypes). Applied AI/ML components include the in-house CARDS2.0 LLM-based classifier for counter-narrative categorization and BERTopic transformer-based topic modelling, but AI is not the core product; it powers specific data projects.
Tortoise's revenue model centers on consumer membership subscriptions (Live and Digital, and Live, Digital and Print tiers, priced at roughly £10/month with auto-renewing billing) supplemented by one-off supporter donations (pay-what-you-can, with the Daily Sensemaker newsletter as thank-you) and ThinkIn community events included as a membership benefit. Distribution spans the tortoisemedia.com and observer.co.uk web properties, mobile apps (now unified under the Observer app), third-party podcast platforms, and Observer print editions. Customer segments are horizontal — general news consumers, ThinkIn community participants, and policy/research users of the data projects — with no enterprise or B2B sales motion. In April 2025, Tortoise completed a £25 million acquisition of The Observer (the world's oldest Sunday newspaper, founded 1791), integrating it as a wholly-owned subsidiary and expanding into print plus a broader culture, style, food, sport, and puzzles surface.
Tortoise Media firmographics
Firmographics- Name
- Tortoise Media
- Legal name
- Tortoise Media Ltd
- Website
- https://tortoisemedia.com
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Tortoise Media is a UK subscription-based digital news publisher founded in 2018, operating the Daily Sensemaker newsletter, investigative podcasts, member-exclusive ThinkIn events, and recurring data journalism projects. In April 2025 it acquired The Observer (the world's oldest Sunday newspaper) for £25M, integrating print and digital newsroom operations.
- Ownership category
- akta.pro rank
Tortoise Media industry classification
Industry- Product category
- Digital News Publishing
- NAICS
- Newspaper Publishers (513110), Periodical Publishers (513120)
- SIC
- Newspapers: Publishing Or Publishing & Printing (2711), Periodicals: Publishing Or Publishing & Printing (2721)
- akta.pro primary industry
- Alternative/Independent Newsweeklies & Opinion Press (MPAJADAH)
Keywords
Where Tortoise Media is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Tortoise Media business model
Business model- GTM type
- B2C
- Offering type
- Digital Commerce or Content
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure, Supply Chain
Revenue model
- Membership Subscriptions: Core revenue stream from membership subscriptions offering digital content access, ThinkIn event tickets, and optional print editions. Auto-renewing subscriptions with monthly or annual billing options.
- One-time Donations: Supporter donations accepted as one-off payments, with 'Daily Sensemaker' newsletter access as thank-you. Used to support editorial operations.
- Events (ThinkIns): Community discussion events included in membership packages (10 ThinkIns per year for Live membership). Recorded and published as promotional content.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Live and Digital membership |
| Subscription | Monthly | Live, Digital and Print membership |
| Subscription | Pay-as-you-go | Supporter donation |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels6 records
Tortoise Media product offering
Product offeringCore offering
Tortoise Media publishes slow, in-depth digital journalism through a portfolio of paid newsletters, original podcasts, member-only ThinkIn discussion events, and a suite of data-driven investigative projects (Global AI Index, Westminster Accounts, Hot Air, Peer Review). Following the April 2025 acquisition of The Observer, the company also publishes the world's oldest Sunday newspaper in print and digital form, with companion Observer mobile apps and a puzzles section. The audience accesses this content through tiered individual memberships (Digital and Digital+Print), one-off supporter donations, and direct purchases.
Product overview
Tortoise Media is a UK-based digital news organization founded in 2018, operating a platform-plus-content model centered on slow journalism and data-driven investigations. The core offering comprises the Daily Sensemaker (free newsletter and paid podcast), The Slow Newscast (investigative weekly podcast), and ThinkIns (member-exclusive discussion events). Following the April 2025 acquisition of The Observer, the portfolio expanded to include the 233-year-old Sunday newspaper (spanning news, culture, style, food, sport, and puzzles), accessible via the rebranded Observer app. Tortoise's data journalism unit produces four flagship data projects: the Global AI Index (nation benchmarking), The Westminster Accounts (political finance tracking with Sky News), Peer Review (House of Lords analysis), and Hot Air (climate misinformation tracking). Membership tiers include Live and Digital (£10/month) and Live, Digital and Print (adds quarterly magazine).
Differentiator
Problem solved
Functional benefit
Products and services
- Tortoise Memberships Recurring subscription membership (Digital tier and Digital+Print tier) that gives individual readers access to Tortoise newsletters, podcasts, member-only ThinkIn events, and (at the Print tier) a bundled subscription to The Observer.
- Daily Sensemaker Flagship daily newsletter that summarises and contextualises the day's news in Tortoise's "slow journalism" voice, available free as a funnel and to paying members.
- Daily Sensemaker Podcast Daily audio version of the Daily Sensemaker newsletter, distributed via Tortoise's own channels and major podcast platforms.
- The Slow Newscast
- The News Meeting
- We Have Notes
- ThinkIns
- Global AI Index
- The Westminster Accounts
- Hot Air
- Peer Review
- The Observer (newspaper) World's oldest Sunday newspaper, published in print and digital form under Tortoise Media ownership following the April 2025 acquisition, available individually and bundled into the Tortoise Digital+Print membership.
- Observer Puzzles
- Observer and Tortoise mobile apps
Quantifiable outcome
- Over £183 million in political funding tracked through Westminster Accounts
- +2 more outcomes
Companies that use Tortoise Media
Customer profileSegments3 records
Ideal customer profiles1 record
Tortoise Media technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability10 records
Feature4 records
Tortoise Media partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Sky NewscoreJoint development of the Westminster Accounts project - the first fully searchable database tracking money flowing into British politics. Tortoise and Sky News jointly launched and continue to maintain this data journalism initiative, which won a data journalism award.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
Tortoise Media competitors and assessment
Company assessmentEmerging players
- Wired: Wired combines long-form journalism with technology and culture coverage and a strong podcast and data product mix. Comparable to Tortoise's blend of investigative reporting, AI/data beat, and flagship podcast portfolio.
- Substack: Substack is a subscription/publisher platform for independent writers and newsrooms. Comparable as a competing direct-to-consumer subscription distribution channel where independent journalists and news outlets monetise paid readerships.
Direct peers
- Politico: Politico's data-driven political journalism (Politico Pro, Playbook newsletters, Pro Policy databases) closely mirrors Tortoise's Westminster Accounts and Peer Review data journalism products, both targeting engaged policy/political news consumers.
- De Correspondent: De Correspondent pioneered the membership-funded, slow-journalism model that directly inspired Tortoise's founding concept. Operates similar reader-supported newsroom with member events and investigative focus.
- The Independent: The Independent is a UK digital-first news outlet that pivoted from print to online-only. Comparable to Tortoise in operating geography, target audience (UK general news consumers) and digital-first distribution model.
- The Guardian: The Guardian is the UK's leading digital-first subscription-supported news outlet with a similar reader-funded model. Most directly comparable to Tortoise given overlapping audience of UK liberal-leaning news consumers, a global digital footprint, and a strong podcast platform.
Broad incumbents
- The Times: The Times is the UK's legacy premium newspaper that successfully transitioned to a paid digital+print subscription model. Comparable as a UK incumbent with combined print heritage and digital subscription product overlap with The Observer.
- The New York Times: The NYT is the global benchmark for subscription-driven digital news and offers the most relevant comparable business model (bundled digital + print + podcasts + games). Tortoise's membership model explicitly mirrors the NYT's subscription flywheel, just at a smaller scale.
- The Daily Telegraph: The Telegraph is a UK broadsheet competitor to The Observer with a paid digital subscription offering. Comparable on UK national news, business and politics coverage and direct competition for paid UK news subscribers.
- Bloomberg: Bloomberg's data-driven financial news including the Bloomberg Terminal / Indices overlaps with Tortoise's Global AI Index and Westminster Accounts, which similarly build proprietary index/ranking products for institutional and policy audiences.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Tortoise Media social profiles
Digital presenceTortoise Media financial estimates
Financial estimateRevenue estimate
Valuation estimate
Tortoise Media leadership team
Management profileNumber of profiles
Profiles7 records
Tortoise Media subsidiaries and ownership
Company hierarchySubsidiaries1 record
Tortoise Media funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Tortoise Media M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Tortoise Media
What does Tortoise Media do?
Tortoise Media publishes slow, in-depth digital journalism through a portfolio of paid newsletters, original podcasts, member-only ThinkIn discussion events, and a suite of data-driven investigative projects (Global AI Index, Westminster Accounts, Hot Air, Peer Review). Following the April 2025 acquisition of The Observer, the company also publishes the world's oldest Sunday newspaper in print and digital form, with companion Observer mobile apps and a puzzles section. The audience accesses this content through tiered individual memberships (Digital and Digital+Print), one-off supporter donations, and direct purchases.
Is Tortoise Media a public or private company?
Tortoise Media is a private company. It is classified as venture growth investor backed and is currently operating.
When was Tortoise Media founded?
Tortoise Media was founded in 2018. It employs 51 to 100 people.
Where is Tortoise Media based?
Tortoise Media is headquartered in London, United Kingdom, in the Europe region.
How does Tortoise Media make money?
Three revenue lines are on record. Membership Subscriptions are the primary driver. The others are one-time Donations and events (ThinkIns).
Who are Tortoise Media's main competitors?
Emerging players on record are Wired and Substack. Direct peers are Politico, De Correspondent, The Independent and The Guardian. Broad incumbents are The Times, The New York Times, The Daily Telegraph and Bloomberg.
Does Tortoise Media have an API?
No public API is recorded for Tortoise Media.
What industry is Tortoise Media in?
Tortoise Media's product category is Digital News Publishing. Its primary akta.pro industry code is MPAJADAH, Alternative/Independent Newsweeklies & Opinion Press. Its NAICS code is 513110 and its SIC code is 2711.