Thinkery

What Thinkery does

Thinkery is a personal knowledge management web application that enables individuals to capture, organize, and retrieve notes, bookmarks, todos, and free-form thoughts through a hashtag-based taxonomy. The product is targeted at individual knowledge workers (horizontal persona) who need a centralized place to corral scattered personal information; the pain points addressed include information overload, fragmented notes across multiple platforms, and difficulty retrieving saved content. The platform is operated by appstretto (Berlin, Germany) and Alexander Kirk (Vienna, Austria) as a private, bootstrapped, founder-funded entity with no disclosed external investment.

The technology stack centers on a web application at thinkery.me with a customizable hashtag system (special tags can be designated as favorites, todos, or assigned custom colors), full-text and as-you-type search, automatic URL metadata extraction from 100+ integrated services (YouTube, Amazon, Soundcloud, Flickr, CNN, Twitter, and others), and an offline-capable sync mechanism with conflict resolution. Distribution is multi-channel: native iOS and Android apps for mobile, Chrome and Firefox browser extensions plus a cross-browser bookmarklet for web capture, a Chrome app for homepage access, and an OAuth2-based REST API (with example SDKs in PHP, Ruby, and Python) that supports sync, CRUD operations, tags management, and webhooks for developers. An import tool enables free migration from Evernote, Instapaper, Springpad, and Delicious. Privacy controls allow users to flag items as public or private; the service uses SSL and Google Analytics for traffic measurement.

The business model is currently freemium in the truest sense: the product is free to use with all core features accessible, and the only revenue stream is voluntary one-time or monthly donations processed via PayPal. The company has publicly indicated a paid service is being prepared but has not yet launched it. New user registration is currently closed on the main web application, and the privacy policy has not been updated since March 2014, suggesting the product is in a maintenance phase with limited active user acquisition. There are no named enterprise customers, no B2B contracts, no paid headcount beyond the two operators, and no disclosed revenue, ARR, GMV, or funding — consistent with a small, independent, founder-funded hobby-stage project.

Name

Thinkery

Legal name

Thinkery

Website

https://thinkery.me

Company type

Private

Founded year

2010

Operating status

Operating

Short description

Thinkery is a personal knowledge management tool that lets individuals capture, organize, and retrieve notes, bookmarks, and todos through a hashtag-based system, accessible via web, mobile, and browser extensions.

Ownership category

akta.pro rank

Product category

Note-Taking Software

NAICS

Web Search Portals and All Other Information Services (519290), Web Search Portals and All Other Information Services (51929)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Topic/Interest-Based Content Discovery Apps (MPACAKAB)

akta.pro secondary industries

Recommendation & Discovery Engines (content/product) (BPAMAAAG), Knowledge Graphs, Ontologies & Entity Resolution (HDAAADAI)

Keywords

• Note taking software
• Personal knowledge management
• Bookmark management tool
• Hashtag organization
• Productivity application

GTM type

B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Donations: Currently accepting one-time and monthly donations via PayPal while preparing a paid service offering. Users can make voluntary financial contributions to support continued development.
2. Future Paid Service: Company is preparing a paid service tier that will replace or supplement the current donation model.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels5 records

Core offering

Thinkery is a personal knowledge management application that lets users store notes, bookmarks, todo lists, and arbitrary thoughts in a single place, organized through a lightweight #hashtag tagging system. The service is delivered through a web app, Android and iOS mobile apps, Chrome and Firefox browser extensions, a bookmarklet, and an OAuth2-based REST API, with smart URL processing that automatically embeds metadata from 100+ services such as YouTube and Amazon.

Product overview

Thinkery is a single, unified web-based personal information management product with companion browser extensions, mobile apps, and a developer API. The core Thinkery web application serves as the central platform for storing notes, bookmarks, todos, and organizing them via hashtags. This is supplemented by Chrome Extension, Firefox Add-On, Android App, iOS App, and Chrome App for accessing data across devices and browsers. A Browser Bookmarklet enables adding content from any website, and an Import Tool supports migration from Evernote, Instapaper, and other services. The Thinkery API provides OAuth2-based programmatic access for developers to build applications around the platform.

Differentiator

Problem solved

Functional benefit

Products and services

• Thinkery Web Application The main web-based personal information management application where users store notes, bookmarks, todo lists, and other items and organize them with #hashtags. Includes customizable colored tags, full-text and as-you-type search, SSL-secured access, and per-item public/private controls. Targeted at individual consumers and personal knowledge workers.
• Thinkery Mobile Apps (Android and iOS) Native mobile applications for Android and iOS that give users on-the-go access to their Thinkery notes, bookmarks, and todos, with seamless cross-device sync and the ability to add, edit, archive, and delete items even when offline. Intended for individual Thinkery users who want mobile productivity.
• Thinkery API OAuth2-authenticated REST API that enables developers and technical users to programmatically access and sync their Thinkery data, manage tags, perform CRUD operations on notes/bookmarks/todos, and register webhooks for notifications. Documented at thinkery.me/api/docs/ and offered to developers as a standalone integration surface.

Segments1 record

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature6 records

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Bear Notes: Bear is an Apple-platform note-taking app with hashtag-based organization and markdown support. Its tagging system closely mirrors Thinkery's #hashtag philosophy for the individual writer persona.
• Pocket: Pocket is a read-later and bookmarking service that lets users save articles, videos, and links with tags and offline access. Like Thinkery, it focuses on individual capture of web content with cross-device sync, making it a close functional peer.
• Simplenote: Simplenote offers free, cross-device plain-text notes with tagging and sync. It targets the same minimalist note-taking niche that Thinkery's hashtag-driven model serves.
• Evernote: Evernote is a flagship cross-platform note-taking and bookmarking service with web clipping, tagging, sync, and mobile apps. Thinkery's import-from-Evernote functionality positions Evernote as its most direct competitor and historical alternative for the same individual knowledge-worker user.
• Obsidian: Obsidian is a local-first, tag-and-link-based knowledge management tool targeting the same individual knowledge-worker persona as Thinkery. Its hashtag/hashtag-driven organization and markdown-first approach are philosophically aligned.
• Pinboard: Pinboard is a paid, tag-driven personal bookmarking service popular with power users. Its tag-based organization, individual subscription model, and minimal-UI ethos map closely to Thinkery's hashtag-centric approach to personal knowledge management.
• Roam Research: Roam Research pioneered bi-directional linking and tag-driven networked notes for individual knowledge workers. It overlaps with Thinkery on the personal knowledge management use case despite a markedly different interaction model.
• Raindrop.io: Raindrop.io is a cross-platform bookmark manager with tagging, collections, browser extensions, and mobile apps. It is a direct comparator to Thinkery in the personal bookmarking and link organization category.
• Instapaper: Instapaper is a read-later and bookmarking service whose integration with Thinkery via import tools confirms a comparable role in the user's save-for-later workflow.

Broad incumbents

• Notion: Notion is a broad productivity platform combining notes, todos, databases, and wikis with cross-platform sync. While much larger and more feature-rich, it overlaps with Thinkery in the horizontal personal note-and-todo organization use case.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/thinkeryme
• Facebookfacebook.com/thinkery

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Thinkery