{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"tool_leelo","slug":"leelo","name":"Leelo","type":"product","url":"https://leelo-ai.com","page_url":"https://unfragile.ai/leelo","categories":["voice-audio"],"tags":[],"pricing":{"model":"freemium","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"tool_leelo__cap_0","uri":"capability://text.generation.language.freemium.text.to.speech.synthesis.with.neural.voice.models","name":"freemium text-to-speech synthesis with neural voice models","description":"Converts written text input into natural-sounding audio output using neural text-to-speech synthesis models, likely leveraging deep learning-based voice generation (e.g., WaveNet, Tacotron, or similar architectures) to produce prosodically natural speech. The system processes plain text, applies linguistic analysis and phoneme conversion, then synthesizes audio waveforms. Freemium tier provides baseline functionality with usage quotas, while premium tiers unlock higher quality or volume.","intents":["I need to quickly generate a voiceover for my blog post without hiring a voice actor","I want to convert educational content into audio format for accessibility","I need to create social media audio snippets from written captions","I want to test text-to-speech quality before committing to an expensive platform"],"best_for":["solo content creators and bloggers producing non-professional audio","educators creating accessible learning materials","small teams prototyping audio-based products with budget constraints"],"limitations":["No documented support for advanced prosody control (pitch, rate, emphasis per word)","Limited language coverage — no public documentation of supported locales","Freemium tier likely has monthly character/minute quotas restricting batch processing","No API-level control over voice parameters or model selection","Synthesis latency unknown — may not support real-time streaming use cases"],"requires":["Active internet connection for cloud-based synthesis","Text input in supported language (unspecified)","Freemium account or paid subscription"],"input_types":["plain text","possibly markdown or formatted text (unconfirmed)"],"output_types":["MP3 audio file","WAV audio file (format unconfirmed)"],"categories":["text-generation-language","audio-synthesis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_leelo__cap_1","uri":"capability://automation.workflow.simple.web.based.text.input.and.audio.download.workflow","name":"simple web-based text input and audio download workflow","description":"Provides a minimal, no-code user interface for pasting text and downloading synthesized audio without requiring API integration, authentication complexity, or technical configuration. The interface likely implements a straightforward form submission pattern: text input field → synthesis trigger → audio file download. Designed for non-technical users with zero setup friction.","intents":["I want to generate a voiceover without learning an API or command-line tools","I need a quick one-off audio file without setting up infrastructure","I want to test the service quality before integrating it programmatically"],"best_for":["non-technical content creators and educators","users prototyping audio workflows before committing to API integration","solo creators who need occasional, ad-hoc voiceovers"],"limitations":["No batch processing capability — requires manual input for each text segment","No programmatic API documented — cannot integrate into automated workflows","No scheduling or asynchronous job submission — likely synchronous only","Browser-dependent — no desktop or CLI alternative mentioned"],"requires":["Modern web browser with JavaScript enabled","Freemium or paid account"],"input_types":["plain text via web form"],"output_types":["downloadable audio file"],"categories":["automation-workflow","user-interface"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_leelo__cap_2","uri":"capability://automation.workflow.freemium.usage.based.quota.management.and.tier.differentiation","name":"freemium usage-based quota management and tier differentiation","description":"Implements a freemium pricing model with usage quotas (likely character count or synthesis minutes per month) that gate access to synthesis functionality. Premium tiers unlock higher quotas, potentially faster synthesis, or additional voice options. Quota enforcement likely occurs server-side via user account tracking and rate limiting. No technical details on quota reset cadence, overage handling, or tier upgrade mechanics are publicly documented.","intents":["I want to try text-to-speech without paying upfront","I need to understand my monthly usage limits before upgrading","I want to scale from free to paid as my content production grows"],"best_for":["budget-conscious creators testing the service","small teams with variable audio production needs","users evaluating Leelo before committing to a paid plan"],"limitations":["Freemium quota limits not publicly specified — unclear if 1000 or 100,000 characters per month","No documented overage pricing or pay-as-you-go model — may require tier upgrade","Quota reset schedule unknown — likely monthly but unconfirmed","No usage dashboard or analytics visible — users cannot track consumption in real-time"],"requires":["User account registration","Freemium or paid subscription"],"input_types":["account metadata"],"output_types":["quota status","billing information"],"categories":["automation-workflow","business-model"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_leelo__cap_3","uri":"capability://text.generation.language.multi.language.text.to.speech.synthesis.scope.unspecified","name":"multi-language text-to-speech synthesis (scope unspecified)","description":"Supports text-to-speech synthesis across multiple languages, though the specific language coverage is not documented on the landing page. The system likely implements language detection (auto-detect from input text) or manual language selection, then routes synthesis requests to language-specific neural models. Phoneme conversion and prosody generation are language-dependent, requiring separate model weights per language.","intents":["I need to create voiceovers for content in languages other than English","I want the system to auto-detect the input language and synthesize appropriately","I need to serve global audiences with localized audio content"],"best_for":["content creators serving multilingual audiences","educational platforms with international reach","global teams creating localized content"],"limitations":["Supported languages not documented — unclear if 5 or 50+ languages supported","Language detection mechanism unknown — may require manual selection","Voice quality likely varies by language — some languages may use lower-quality models","No information on accent, dialect, or regional variant support","Phoneme coverage and pronunciation accuracy unknown per language"],"requires":["Text input in a supported language (unspecified list)"],"input_types":["plain text in target language"],"output_types":["audio file in target language"],"categories":["text-generation-language","localization"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_leelo__cap_4","uri":"capability://text.generation.language.natural.sounding.prosody.and.voice.quality.synthesis","name":"natural-sounding prosody and voice quality synthesis","description":"Generates speech with natural prosody (intonation, stress, rhythm) using neural models that learn prosodic patterns from training data. The system likely applies linguistic feature extraction (phonemes, part-of-speech, punctuation) to inform prosody generation, producing speech that sounds conversational rather than robotic. Voice quality is determined by the underlying neural model architecture and training data quality, but specific model details are not disclosed.","intents":["I want voiceovers that sound natural and engaging, not robotic","I need audio that maintains proper emphasis and intonation for readability","I want to use TTS for content where voice quality matters to audience perception"],"best_for":["content creators prioritizing audio quality over cost","educational platforms where voice naturalness affects learning outcomes","podcasters and audio producers seeking TTS alternatives to human voice actors"],"limitations":["No control over prosody parameters (pitch, rate, emphasis) — one-size-fits-all synthesis","Prosody quality likely degrades on complex punctuation or ambiguous sentence structures","No emotion or tone control — cannot synthesize angry, sad, or enthusiastic speech","Voice naturalness subjective — no published MOS (Mean Opinion Score) or quality benchmarks"],"requires":["Well-formed text input with proper punctuation for optimal prosody"],"input_types":["plain text"],"output_types":["audio file with natural prosody"],"categories":["text-generation-language","audio-synthesis"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":39,"verified":false,"data_access_risk":"low","permissions":["Active internet connection for cloud-based synthesis","Text input in supported language (unspecified)","Freemium account or paid subscription","Modern web browser with JavaScript enabled","Freemium or paid account","User account registration","Freemium or paid subscription","Text input in a supported language (unspecified list)","Well-formed text input with proper punctuation for optimal prosody"],"failure_modes":["No documented support for advanced prosody control (pitch, rate, emphasis per word)","Limited language coverage — no public documentation of supported locales","Freemium tier likely has monthly character/minute quotas restricting batch processing","No API-level control over voice parameters or model selection","Synthesis latency unknown — may not support real-time streaming use cases","No batch processing capability — requires manual input for each text segment","No programmatic API documented — cannot integrate into automated workflows","No scheduling or asynchronous job submission — likely synchronous only","Browser-dependent — no desktop or CLI alternative mentioned","Freemium quota limits not publicly specified — unclear if 1000 or 100,000 characters per month","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.31666666666666665,"quality":0.67,"ecosystem":0.15000000000000002,"match_graph":0.25,"freshness":0.75,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.1,"match_graph":0.35,"freshness":0.05}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:31.446Z","last_scraped_at":"2026-04-05T13:23:42.560Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=leelo","compare_url":"https://unfragile.ai/compare?artifact=leelo"}},"signature":"lklPUwQBWqSIXgbrAMB5rQnyT1JOesd2yMxuvbtZSFxLIrAI7L5iaOIZWOTCI3z/gPSyvaXqCCZWYTK6BUiICw==","signedAt":"2026-06-21T01:37:02.468Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/leelo","artifact":"https://unfragile.ai/leelo","verify":"https://unfragile.ai/api/v1/verify?slug=leelo","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}