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IBM states that its Natural Language Understanding Lite plan is perpetual and includes 30,000 NLU items and one custom model per calendar month, establishing recurring free AI text analysis.

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Microsoft's official Computer Vision pricing page lists a Free F0 tier, including one free camera per month for spatial analysis; this is renewable free access to the computer-vision capability.

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Google's official Dialogflow pricing and quota pages show a continuing, limited no-charge Dialogflow ES request quota (1,000 requests per month); this is not a time-limited trial credit.

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Official pricing describes a free plan with the core authoring workflow, establishing a usable free capability of Chat Mapper.

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AI Dungeon's current official help page says the game is free-to-play and a free account includes its basic features; the page describes AI-driven storytelling, not a finite trial or welcome-credit offer.

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Current official pricing confirms trial accounts revert to a continuing Community free plan for Testim Web testing; the plan is distinct from the trial, is limited to one per organization, and its features may change.

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Official pricing lists a $0 Free plan with full API access and says it is free forever; the plan covers Diffbot's natural-language-processing API.

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Google's current Cloud Natural Language pricing lists the first 5,000 units per month as free for entity analysis, sentiment analysis, and syntax analysis; this is a recurring monthly allowance for the listed API.

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Official MeaningCloud terms describe an active Free Plan and its official SDK documentation identifies text classification APIs available under a basic Free plan.

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Official pricing labels the author-writing platform Free Forever and says the free tier supports writing and editing without a word limit.

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Official pricing offers AutoCrit Free Forever at $0 per month with its writing platform and editing guidance, enabling ongoing use.

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Official pricing lists a free plan with 80+ AI tools and no credit card required; the homepage describes generating education content with those tools.

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Official plans list a $0 Free plan that provides 20 song recommendations per search, an ongoing usable music-discovery capability.

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Official pricing lists a $0-per-month Free plan for the AI summarizer, establishing a usable continuing free tier.

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Official IBM text-to-speech pricing lists a Free plan with 10,000 characters per month at no cost, establishing recurring free use of the listed speech-synthesis capability.

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NaturalReader's official web app advertises a Free Forever plan with unlimited listening in free voices and daily AI-voice use; its FAQ specifies up to five minutes per day for Plus AI Voices, a recurring usable AI allowance.

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The official Text to Speech page explicitly describes Wideo's text-to-speech technology as free and identifies it as a usable text-to-voice tool, establishing free access to the listed AI capability.

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Official Polly for Slack pricing lists a $0 Free tier with instant in-channel feedback, a repeatable core capability of the listed product.

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Google Cloud's official Cloud Translation pricing page provides the first 500,000 characters per month at no charge, a recurring monthly allowance for the listed translation capability.

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The official MyMemory API pricing page labels its hosted translation API “Free” and says it remains available as a hosted service, establishing continuing free machine-translation access; no recurring quota is stated on that page.

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Official pricing describes a free plan for small projects with up to 200 source keys and essential localization features; the Business trial is separately identified as 14 days.

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Official pricing lists TripIt FREE for ongoing itinerary organization and access across devices; Pro is a separate paid upgrade.

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Tripadvisor's official AI Assistant page describes shareable day-by-day AI itineraries and explicitly says the service is completely free and can be started without an account.

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The official AI Trip Planner page describes an AI assistant for planning and reorganizing itineraries; Tripomatic's official feature pages label trip-planning functionality free, establishing usable free AI planning.

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Databricks' official Free Edition is a free platform for continuing experimentation across data and AI use cases, including building AI applications and agents; this establishes an ongoing usable AI capability.

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Official Mockplus RP pricing offers a no-time-limit free plan with three prototypes and ten pages per prototype.

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GitLab's official pricing documents its continuing Free tier for core source-control and DevSecOps capabilities, with tier limits distinct from paid plans.

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Google's official pricing page lists a monthly free usage tier for video annotation operations, including text, logo, face, and person detection; these are usable AI video-analysis API capabilities.

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Official pricing lists a $0 Free plan with one minute of video translation per month and 1 GB storage, documenting recurring free use.

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Official pricing advertises a Free Forever plan with unlimited video recording, sharing, and downloads for the listed product.

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