What Thesaurus.com does

Thesaurus.com is a free, consumer-facing online thesaurus that provides synonyms, antonyms, definitions, pronunciation guides, and example sentences for English words. The platform is built on a curated corpus of over 500,000 expert-authored dictionary and thesaurus entries and is operated by Dictionary.com, LLC, a division of IXL Learning, as part of the Dictionary Media Group. Adjacent content features include a daily Word of the Day widget, editorial articles on word usage and grammar, trending-words lists, and cross-promoted daily word games (e.g., WordStrike) from sister brand Words.com. The service is accessible globally via the web at thesaurus.com and through mobile applications on iOS and Android.

The business model is primarily advertising-based, with third-party display and targeted advertising delivered through ad networks referenced in the privacy policy (InMobi, TripleLift, Teads). The Terms of Service and Privacy Policy also reference subscriptions and a premium version of the service, indicating potential recurring-revenue monetization, but no public pricing has been disclosed. Go-to-market is product-led growth: users discover Thesaurus.com organically through search engines and word lookups, with no enterprise sales motion or channel partner distribution. Marketing relies on content marketing (grammar and word-usage articles), social media, SEO for high-volume word queries, and word-based games.

Thesaurus.com is one brand within IXL Learning's Dictionary Media Group portfolio, which also includes Dictionary.com, Vocabulary.com, Words.com, Ingles.com, SpanishDict.com, FrenchDictionary.com, and other language resources. The parent group claims to reach over 500 million learners annually across its portfolio. Thesaurus.com itself is staffed by 1-10 employees and is headquartered in San Mateo, California, as part of Dictionary.com, LLC, with Terms of Service governed by Michigan law.

Name

Thesaurus.com

Legal name

Dictionary.com, LLC

Website

https://thesaurus.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Thesaurus.com is a free online English thesaurus providing synonyms, antonyms, definitions, and example sentences across 500,000+ expert-authored entries. Operated by Dictionary.com, LLC under IXL Learning, it serves general consumers worldwide via web and mobile apps, monetized primarily through advertising.

Ownership category

akta.pro rank

Product category

Online Reference and Language Learning

NAICS

Web Search Portals, Libraries, Archives, and Other Information Services (5192)

akta.pro primary industry

Vocabulary, Flashcards, SRS & Memorization Platforms (EDAFAOAF)

akta.pro secondary industries

Microlearning Content Libraries (Bite-Sized Lessons) (EDAFACAI), Language Content Libraries & Digital Readers (Leveled Readers, Graded Content) (EDAFAOAM)

Keywords

• Online thesaurus
• Synonyms antonyms
• Dictionary reference
• Vocabulary learning
• Word lookup tools

Headquarters

HQ city

San Mateo

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Digital Commerce or Content

Cost components

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

Revenue model

1. Advertising (display and targeted): Free access supported by advertising revenue. The site displays third-party advertisements and engages in targeted advertising based on user activity. The privacy policy references third-party ad networks including InMobi, TripleLift, and Teads Inc. This is the primary revenue model for the free service.
2. Subscription / Premium Services: The Terms of Service and Privacy Policy reference subscriptions, premium versions, and purchases, indicating a potential paid tier. The privacy policy mentions 'a subscription or a premium version of one of our Services' and 'make a purchase (such as a subscription).' No specific pricing is publicly disclosed.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Thesaurus.com operates a free online English thesaurus and reference platform that lets users look up synonyms, antonyms, definitions, pronunciation guides, and example sentences for words. The platform features over 500,000 expert-authored dictionary and thesaurus entries and is supplemented by editorial articles on grammar, word usage, idioms, and commonly confused words, plus word games such as WordStrike.

Product overview

Thesaurus.com is a single consumer-facing web and mobile platform providing synonyms and antonyms for English words. It is operated by Dictionary.com, LLC as part of Dictionary Media Group (a division of IXL Learning). The core product consists of over 500,000 expert-authored dictionary and thesaurus entries, supplemented by educational content features including Word of the Day, word usage articles, and trending words. The platform is ad-supported and free for general use, with a companion mobile app available on iOS and Android app stores. Adjacent products include the Words.com family of word games (such as WordStrike). The platform does not offer separate product tiers, enterprise versions, or public API access.

Differentiator

Problem solved

Functional benefit

Products and services

• Thesaurus.com Web Platform
• Dictionary.com Mobile App (iOS and Android)

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature1 record

Partnerships

Four partnerships are on record, tiered core and minor.

• IXL Learning (Parent Company)coreOthersThesaurus.com is operated by Dictionary.com, LLC, which is a division of IXL Learning. The IXL Learning brand portfolio includes Thesaurus.com, Dictionary.com, Vocabulary.com, Words.com, and other language learning resources. IXL Learning is a comprehensive K-12 personalized learning platform. The parent company's infrastructure supports the Dictionary Media Group.
• Vocabulary.comminorOthersPart of the Dictionary Media Group (IXL Learning) brand portfolio. Vocabulary.com offers adaptive learning for English vocabulary, complementing Thesaurus.com's synonym/antonym lookup functionality. Cross-promotional links appear in the site footer.
• Words.comminorOthersA sister brand under Dictionary Media Group offering fun daily word games including WordStrike. Cross-promoted on Thesaurus.com. Complements the learning ecosystem with gamified vocabulary engagement.
• Dictionary.comcoreOthersThesaurus.com is closely integrated with Dictionary.com — the two sites share branding, navigation, and cross-link extensively. Dictionary.com is the primary dictionary resource in the same portfolio. Word of the Day widget on Thesaurus.com links to Dictionary.com. Both operated by Dictionary.com, LLC under IXL Learning.

Scale indicators2 records

Recent moves4 records

Expansion highlights5 records

Direct peers

• WordHippo: Free online thesaurus and word tools site covering synonyms, antonyms, translations, and rhymes. Directly comparable to Thesaurus.com on the core word-lookup product and similar ad-supported business model.
• Vocabulary.com: Sister brand under Dictionary Media Group offering adaptive learning for English vocabulary. Directly overlaps with Thesaurus.com on vocabulary acquisition and is cross-promoted via the footer, making it a highly comparable platform.
• Synonyms.com: Free online synonym/antonym reference site. Directly comparable to Thesaurus.com in product scope, audience (writers and word lookup users), and ad-supported business model.
• Power Thesaurus: Community-driven online thesaurus providing synonyms and antonyms. Directly competes with Thesaurus.com on the synonym/antonym lookup use case with a similar free, ad-supported model.
• Dictionary.com: Sister brand under Dictionary Media Group (IXL Learning) offering comprehensive word definitions and usage. Operates from the same parent and shares branding, navigation, and cross-linking with Thesaurus.com, making it the closest comparable.

Emerging players

• Ludwig: AI-powered writing and reference tool offering contextual examples, synonym suggestions, and translation help. Adjacent to Thesaurus.com's writing-assistance use case and an emerging competitor for word-choice and writing-coaching intent.
• Reverso: Multilingual dictionary, synonym, and translation tool with AI-assisted features. Comparable as a reference and language-lookup product with overlapping thesaurus functionality and an emerging focus on AI-augmented lookups.

Broad incumbents

• Oxford Languages / Oxford Dictionary: Major incumbent dictionary and thesaurus brand via Oxford University Press, with strong institutional credibility and learner-focused products. Comparable on the core synonym/definition use case Thesaurus.com serves.
• Cambridge Dictionary: Established free online dictionary with thesaurus functionality and strong usage-example content. Comparable to Thesaurus.com on word lookup intent, particularly for learners and writers.
• Merriam-Webster: Established incumbent English dictionary and thesaurus brand with deep editorial authority, mobile apps, and a paid subscription tier. Competes with Thesaurus.com on the same word-lookup intent but as part of a broader reference portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/dictionarycom
• YouTubeyoutube.com/c/DictionarycomVideo
• Facebookfacebook.com/dictionarycom
• LinkedInlinkedIn.com/company/dictionary.com
• Instagraminstagram.com/dictionarycom

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 Thesaurus.com