15,347 tools
Compare plans, free tiers and API access across thousands of AI tools — every fact carries its source and check date.
Popular
Tools you can compare today
Catalog
Free planSecurity
Onetime Secret shares passwords and other sensitive text through links that self-destruct after viewing or expiry. The service supports hosted regional sites, custom domains, email delivery, REST API access, and self-hosted deployments.
Free tier unknownMarket infrastructure
OneChronos Group builds smart markets where optimization-based matching and expressive bids replace traditional queue priority, starting with a U.S. equities ATS and expanding to FX, rates, energy, and compute asset classes. The company targets both human traders and agentic execution systems.
Free planCode
OneCLI provides open-source AI teammates that connect to company tools with isolated VMs, policy controls, and human approval on sensitive writes. Teams delegate CRM updates, BI queries, and incident response from Slack or the web, with self-hosting available on higher tiers.
Free planCode
OneCompiler is an online IDE and compiler platform for writing, running, and sharing code in 110+ languages and databases. It adds AI-assisted building blocks, studio time, and team-oriented paid tiers on top of a free compiler that supports unlimited code executions with daily AI credit limits.
Free planDevOps
OneDev is a self-hosted dev platform combining Git hosting, issues, pull requests, CI/CD, packages, wiki, and workspaces with AI-assisted workflows. It targets teams that want an integrated toolchain without stitching separate SaaS products.
Free tier unknownCode
OnePatch instruments production stacks, verifies pull requests against live telemetry, and helps on-call teams catch regressions faster. It targets engineering organizations shipping many PRs daily who need monitors, dashboards, and incident threads tied to recent changes.
Free tier unknownCode
Onepilot is a mobile SSH and agent IDE for iPhone that keeps terminal sessions alive across disconnects. It pairs to Linux, macOS, or Windows hosts, deploys OpenClaw or Hermes agents over SSH, stores LLM keys in the iOS Keychain, and alerts you when infrastructure fails.
Free planWriting
OneSignal is a customer engagement platform for mobile push, web push, email, SMS, and in-app messaging. It targets product and growth teams that need self-service messaging plans with usage-based overages and higher-touch annual tiers for advanced segmentation.
Free tier unknownCode
OneTriangle builds a KV cache-aware inference engine that prefills on a smaller model and decodes on a larger one. By transferring key-value cache between models, it targets lower prefill cost and faster first responses on long inputs without sacrificing decode quality when pairs pass quality gates.
Free planAssistant
OnlineGDB is a browser-based online compiler and debugger supporting C, C++, Java, Python, and many other languages with collaborative project saving, classroom features, and optional premium upgrades.
Free planAssistant
OnlineInterview.io is a free browser-based technical interview room with collaborative code editing, embedded video chat, a drawing canvas, and multi-language REPL execution for remote hiring loops.
Free planAssistant
OnlineOrNot provides uptime monitoring, SSL checks, multi-location HTTP verification, and status pages with alerts to Slack, PagerDuty, SMS, and webhooks. Hobby covers personal labs while Pro adds faster intervals, on-call integrations, and authenticated API access.
Free planMobile
Onloc is a self-hosted device tracking stack with an Android app for live location, history, and remote commands such as ring or lock. Operators host their own server to keep location data under their control.
Free planProductivity
ONLYOFFICE DocSpace is a document collaboration platform with rooms for files, real-time co-editing, and cloud or on-premise deployment. The vendor also sells Workspace bundles with Docs, Mail, Groups, and Talk for organizations.
Free planAssistant
onomeo is a public-beta service that offers a unified OpenAI-compatible API and browser chat across dozens of models, including free-to-call models and credit-metered access to Claude, GPT, and other large models. Users get one API key for tools such as Cline, Open WebUI, and SillyTavern, with usage tracked in credits or free call quotas.
Free trialAI Agents
ONPUSH Studio offers a Spanish-language team of specialized AI marketing assistants that share brand context. Roles cover strategy, social copy, design, website work and lead capture, with deliverables organized for review. A guided brand onboarding supplies the common context rather than requiring repeated background in each conversation.
Free to startAssistant
Onshore helps U.S. businesses in agriculture, manufacturing, engineering, oil and gas, and related industries claim R&D tax credits and specialty deductions. AI agents ingest your existing documents or connected systems, map activity against the tax code, and credentialed experts verify results before amended returns and audit-ready packages are delivered.
Free tier unknownResearch
Ontop provides global hiring and payroll infrastructure so companies can contract or employ talent in 150+ countries while workers receive pay through Ontop wallet and card products. Pricing advertises transparent monthly fees for contractor-of-record and blended contractor-plus-employee setups.
Free tier unknownAssistant
Ontora is an AI transformation platform for companies, consultants, and private-equity owners. It interviews employees in parallel, maps processes and handoffs, prioritizes high-impact automation opportunities, and helps teams implement solutions while measuring effects on cost, capacity, and growth.
Free tier unknownResearch
Ooak Data is an applied AI research lab that turns real enterprise workflows into anonymized digital twins and reinforcement-learning environments. It builds multimodal datasets, expert-level multi-step tasks, and evaluation pipelines so frontier agents are tested on authentic work—not synthetic proxies alone.
Free planCompliance
Open Archiver is an open-source, self-hosted email archiving platform for Google Workspace, Microsoft 365, and IMAP sources with full-text search across messages and attachments. An Enterprise Edition adds compliance controls such as retention policies and audit logging.
Free tier unknownCode
Open Code Review is marketed as the open source code review agent on its official site, with a lightweight web presence pointing builders to the project repository. The homepage meta description positions it as an agentic reviewer rather than a hosted SaaS suite.
Free planEducation
Open eClass is a free, open-source e-learning platform from GUnet for courses, assignments, quizzes, learning paths, multimedia, and statistics. Institutions can download releases, customize the PHP codebase, and offer responsive or mobile access.
Free planAssistant
Open Instruct is Allen AI’s open-source codebase for instruction tuning and post-training language models on public datasets. It ships unified recipes for supervised fine-tuning, DPO, preference optimization, reinforcement learning with verifiable rewards, and related evaluation hooks used in Tülu and OLMo research releases.
Showing 10,704 of 15,347 tools
Plan facts carry individual sources and check dates. Unknown values are excluded from required filters.
Method
Pricing, free tiers and API access come from the vendor's own pages, with the link kept next to the fact.
Every record shows when it was last checked, so you know how fresh a price or limit really is.
Submit it with a source, or send a correction. Editors review every change.