Best Artificial Intelligence (AI) APIs with a Free Trial of 2025

Vertex AI offers a powerful suite of AI APIs that empower developers to seamlessly incorporate sophisticated machine learning and artificial intelligence features into their applications. These APIs provide straightforward access to pre-trained models, enabling organizations to enhance their systems with functionalities like natural language processing, image recognition, and predictive analytics. Designed with user-friendliness and versatility in mind, Vertex AI’s APIs support a wide range of programming languages and platforms. New users are welcomed with $300 in complimentary credits, giving them the opportunity to explore the available APIs and integrate AI features into their offerings. By leveraging these APIs, businesses can significantly boost their applications with state-of-the-art AI technology without the need to create models from the ground up.

The Google Cloud Speech-to-Text API is a robust artificial intelligence tool designed for developers who want to incorporate speech recognition features into their applications effortlessly. This API enables real-time processing of audio input, converting it into text, which makes it ideal for diverse uses such as voice search and interactive applications. Its adaptability is further demonstrated by its capacity to work with multiple audio formats and accommodate different speech patterns. Moreover, it boasts advanced functionalities for managing longer audio recordings and distinguishing between multiple speakers, providing a more thorough transcription experience. New users can also take advantage of $300 in complimentary credits to test out these AI capabilities, allowing them to fully explore the API's offerings without any upfront costs.

Qloo, the "Cultural AI", is capable of decoding and forecasting consumer tastes around the world. Privacy-first API that predicts global consumer preferences, catalogs hundreds of million of cultural entities, and is privacy-first. Our API provides contextualized personalization and insight based on deep understanding of consumer behavior. We have access to more than 575,000,000 people, places, and things. Our technology allows you to see beyond trends and discover the connections that underlie people's tastes in their world. Our vast library includes entities such as brands, music, film and fashion. We also have information about notable people. Results are delivered in milliseconds. They can be weighted with factors like regionalization and real time popularity. Companies who want to use best-in-class data to enhance their customer experiences. Our flagship recommendation API provides results based on demographics and preferences, cultural entities, metadata, geolocational factors, and metadata.

Best-in-Market Speech-to-Text & Voice AI for Enterprises. Speechmatics delivers industry-leading Speech-to-Text and Voice AI for enterprises needing unrivaled accuracy, security, and flexibility. Our enterprise-grade APIs provide real-time and batch transcription with exceptional precision—across the widest range of languages, dialects, and accents. Powered by Foundational Speech Technology, Speechmatics supports mission-critical voice applications in media, contact centers, finance, healthcare, and more. With on-prem, cloud, and hybrid deployment, businesses maintain full control over data security while unlocking voice insights. Trusted by global leaders, Speechmatics is the top choice for best-in-class transcription and voice intelligence. 🔹 Unmatched Accuracy – Superior transcription across languages & accents 🔹 Flexible Deployment – Cloud, on-prem, and hybrid 🔹 Enterprise-Grade Security – Full data control 🔹 Real-Time & Batch Processing – Scalable transcription 🚀 Power your Speech-to-Text and Voice AI with Speechmatics today!

Multilingualize your content and apps with machine translation that is available in thousands of languages. The Translation API Basic Edition instantly translates your website or application texts into more than 100 different languages. The Advanced Edition offers dynamic results as quickly as Basic edition but also includes customization features. This is important when you are using phrases or terms that are unique to certain areas and contexts. The Translation API's pre-trained model supports over 100 languages, from Afrikaans through to Zulu. AutoML Translation allows you to create custom models for more than fifty languages. The Translation API glossary ensures that the content you translate is true to your brand. You only need to specify which vocabulary you would like to give priority to, and save the glossary in your translation project.

Murf API is a cutting-edge text-to-speech (TTS) solution that converts written content into highly realistic, human-like voiceovers with precision and ease. Designed for developers and businesses, it offers advanced features such as pitch and speed control, adjustable pauses, fine-tuned audio duration, and an extensive pronunciation library. With over 133 AI voices available in 20+ languages, including diverse regional accents, Murf API makes it simple to create localized and engaging audio content for global users. It supports multiple audio formats, including MP3, WAV, FLAC, ALAW, ULAW, and Base64, ensuring compatibility across different platforms. Backed by flexible, transparent pricing, strong security protocols, and detailed documentation, Murf API seamlessly integrates with websites, chatbots, IVR systems, and mobile applications.

Dialogflow by Google Cloud is a natural-language understanding platform that allows you to create and integrate a conversational interface into your mobile, web, or device. It also makes it easy for you to integrate a bot, interactive voice response system, or other type of user interface into your app, web, or mobile application. Dialogflow allows you to create new ways for customers to interact with your product. Dialogflow can analyze input from customers in multiple formats, including text and audio (such as voice or phone calls). Dialogflow can also respond to customers via text or synthetic speech. Dialogflow CX, ES offer virtual agent services for chatbots or contact centers. Agent Assist can be used to assist human agents in contact centers that have them. Agent Assist offers real-time suggestions to human agents, even while they are talking with customers.

Our models are designed to comprehend and produce natural language effectively. We provide four primary models, each tailored for varying levels of complexity and speed to address diverse tasks. Among these, Davinci stands out as the most powerful, while Ada excels in speed. The core GPT-3 models are primarily intended for use with the text completion endpoint, but we also have specific models optimized for alternative endpoints. Davinci is not only the most capable within its family but also adept at executing tasks with less guidance compared to its peers. For scenarios that demand deep content understanding, such as tailored summarization and creative writing, Davinci consistently delivers superior outcomes. However, its enhanced capabilities necessitate greater computational resources, resulting in higher costs per API call and slower response times compared to other models. Overall, selecting the appropriate model depends on the specific requirements of the task at hand.

GPT-4, or Generative Pre-trained Transformer 4, is a highly advanced unsupervised language model that is anticipated for release by OpenAI. As the successor to GPT-3, it belongs to the GPT-n series of natural language processing models and was developed using an extensive dataset comprising 45TB of text, enabling it to generate and comprehend text in a manner akin to human communication. Distinct from many conventional NLP models, GPT-4 operates without the need for additional training data tailored to specific tasks. It is capable of generating text or responding to inquiries by utilizing only the context it creates internally. Demonstrating remarkable versatility, GPT-4 can adeptly tackle a diverse array of tasks such as translation, summarization, question answering, sentiment analysis, and more, all without any dedicated task-specific training. This ability to perform such varied functions further highlights its potential impact on the field of artificial intelligence and natural language processing.

The GPT-3.5 series represents an advancement in OpenAI's large language models, building on the capabilities of its predecessor, GPT-3. These models excel at comprehending and producing human-like text, with four primary variations designed for various applications. The core GPT-3.5 models are intended to be utilized through the text completion endpoint, while additional models are optimized for different endpoint functionalities. Among these, the Davinci model family stands out as the most powerful, capable of executing any task that the other models can handle, often requiring less detailed input. For tasks that demand a deep understanding of context, such as tailoring summaries for specific audiences or generating creative content, the Davinci model tends to yield superior outcomes. However, this enhanced capability comes at a cost, as Davinci requires more computing resources, making it pricier for API usage and slower compared to its counterparts. Overall, the advancements in GPT-3.5 not only improve performance but also expand the range of potential applications.

The GPT-4 model represents a significant advancement in AI, being a large multimodal system capable of handling both text and image inputs while producing text outputs, which allows it to tackle complex challenges with a level of precision unmatched by earlier models due to its extensive general knowledge and enhanced reasoning skills. Accessible through the OpenAI API for subscribers, GPT-4 is also designed for chat interactions, similar to gpt-3.5-turbo, while proving effective for conventional completion tasks via the Chat Completions API. This state-of-the-art version of GPT-4 boasts improved features such as better adherence to instructions, JSON mode, consistent output generation, and the ability to call functions in parallel, making it a versatile tool for developers. However, it is important to note that this preview version is not fully prepared for high-volume production use, as it has a limit of 4,096 output tokens. Users are encouraged to explore its capabilities while keeping in mind its current limitations.

Leverage advanced machine learning techniques for thorough text analysis that can extract, interpret, and securely store textual data. With AutoML, you can create top-tier custom machine learning models effortlessly, without writing any code. Implement natural language understanding through the Natural Language API to enhance your applications. Utilize entity analysis to pinpoint and categorize various fields in documents, such as emails, chats, and social media interactions, followed by sentiment analysis to gauge customer feedback and derive actionable insights for product improvements and user experience. The Natural Language API, combined with speech-to-text capabilities, can also provide valuable insights from audio sources. Additionally, the Vision API enhances your capabilities with optical character recognition (OCR) for digitizing scanned documents. The Translation API further enables sentiment understanding across diverse languages. With custom entity extraction, you can identify specialized entities within your documents that may not be recognized by standard models, saving both time and resources on manual processing. Ultimately, you can train your own high-quality machine learning models to effectively classify, extract, and assess sentiment, making your analysis more targeted and efficient. This comprehensive approach ensures a robust understanding of textual and audio data, empowering businesses with deeper insights.

Create state-of-the-art, commercially viable AI solutions using both pre-built and customizable APIs and models. Seamlessly integrate generative AI into your production processes through various studios, SDKs, and APIs. Enhance your competitive position by developing AI applications that leverage foundational models from prominent sources like OpenAI, Meta, and Microsoft. Implement safeguards against misuse with integrated responsible AI practices, top-tier Azure security features, and specialized tools for ethical AI development. Design your own copilot and generative AI solutions utilizing advanced language and vision models. Access the most pertinent information through keyword, vector, and hybrid search methodologies. Continuously oversee text and visual content to identify potentially harmful or inappropriate material. Effortlessly translate documents and text in real time, supporting over 100 different languages while ensuring accessibility for diverse audiences. This comprehensive toolkit empowers developers to innovate while prioritizing safety and efficiency in AI deployment.

Eden AI streamlines the utilization and implementation of AI technologies through a unique API, seamlessly linked to top-tier AI engines. We value your time, sparing you the hassle of choosing the ideal AI engine for your project and data. Forget about waiting for weeks to switch your AI engine – with us, it's a matter of seconds, and it's completely free. Our commitment is to secure the most cost-effective provider without compromising performance quality.

spaCy is crafted to empower users in practical applications, enabling the development of tangible products and the extraction of valuable insights. The library is mindful of your time, striving to minimize any delays in your workflow. Installation is straightforward, and the API is both intuitive and efficient to work with. spaCy is particularly adept at handling large-scale information extraction assignments. Built from the ground up using meticulously managed Cython, it ensures optimal performance. If your project requires processing vast datasets, spaCy is undoubtedly the go-to library. Since its launch in 2015, it has established itself as a benchmark in the industry, supported by a robust ecosystem. Users can select from various plugins, seamlessly integrate with machine learning frameworks, and create tailored components and workflows. It includes features for named entity recognition, part-of-speech tagging, dependency parsing, sentence segmentation, text classification, lemmatization, morphological analysis, entity linking, and much more. Its architecture allows for easy customization, which facilitates adding unique components and attributes. Moreover, it simplifies model packaging, deployment, and the overall management of workflows, making it an invaluable tool for any data-driven project.

The AI/ML API serves as a revolutionary tool for developers and SaaS entrepreneurs eager to embed advanced AI functionalities into their offerings. It provides a centralized hub for access to an impressive array of over 200 cutting-edge AI models, encompassing various domains such as natural language processing and computer vision. For developers, the platform boasts an extensive library of models that allows for quick prototyping and deployment. It also features a developer-friendly integration process through RESTful APIs and SDKs, ensuring smooth incorporation into existing tech stacks. Additionally, its serverless architecture enables developers to concentrate on writing code rather than managing infrastructure. SaaS entrepreneurs can benefit significantly from this platform as well. They can achieve a rapid time-to-market by utilizing sophisticated AI solutions without the need to develop them from the ground up. Furthermore, the AI/ML API is designed to be scalable, accommodating everything from minimum viable products (MVPs) to full enterprise solutions, fostering growth alongside the business. Its cost-efficient pay-as-you-go pricing model minimizes initial financial outlay, promoting better budget management. Ultimately, leveraging this platform allows businesses to maintain a competitive edge through access to constantly evolving AI models. The integration of such technology can profoundly impact the overall productivity and innovation within a company.

MeaningCloud is the easiest, most cost-effective, and most cost-effective way to extract meaning from unstructured content (articles, documents, social conversations, etc.). We offer text analytics products that provide the most accurate insights possible from any content in any language. We do it both SaaS-based and on-prem. We have worked in a variety of industries, including pharma, finance, media and retail. We develop tailored and industry-specific solutions. Our scenarios include: * Insight extraction * Analysis of the voice and opinions of the customer, employee or citizen. (User experience analytics and customer experience analytics in general. * Intelligent document automation Our APIs are free to use (20,000 API calls per year). Get our add-ins for Excel or Google sheets. Our integrations with Dataiku RapidMiner, Automation Anywhere, and Automation Anywhere as well as our SDKs (PHP, Python, Java and JavaScript) are available.

Transform audio and video files, along with live audio streams, into text effortlessly using AssemblyAI's robust speech-to-text APIs. Enhance your audio intelligence capabilities through features such as summarization, content moderation, and topic detection, all driven by state-of-the-art AI technology. AssemblyAI is dedicated to delivering an exceptional experience for developers, offering everything from thorough tutorials and detailed changelogs to extensive documentation. With a focus on core speech-to-text functionality and sentiment analysis, our straightforward API provides a comprehensive range of solutions tailored to meet the speech-to-text requirements of any business. We cater to startups at various stages, from those just starting out to those in the growth phase, by offering affordable speech-to-text options. Our infrastructure is designed to scale efficiently; we handle millions of audio files daily for a diverse clientele, which includes numerous Fortune 500 companies. By utilizing Universal-2, our most sophisticated speech-to-text model, you can capture the nuances of human speech, resulting in more precise audio data that generates clearer insights. This commitment to accuracy and efficiency makes AssemblyAI a leading choice for organizations seeking to leverage audio data effectively.

Effortlessly create, launch, and oversee computer vision applications with a fully managed application development environment that cuts down the development time from days to mere minutes at a fraction of the cost compared to existing solutions. Seamlessly ingest live video and image streams on a global scale, allowing for rapid and convenient data handling. Utilize a user-friendly drag-and-drop interface to develop computer vision applications with ease. Efficiently store and search through petabytes of data, all while benefiting from integrated AI functionalities. Vertex AI Vision equips users with comprehensive tools to manage every stage of their computer vision application life cycle, including ingestion, analysis, storage, and deployment. Connect the output of your applications effortlessly to data destinations, such as BigQuery for in-depth analytics or live streaming to promptly drive business decisions. Ingest and process thousands of video streams from various locations worldwide, ensuring scalability and flexibility. With a subscription-based pricing model, users can take advantage of costs that are up to ten times lower than those of previous options, providing a more economical solution for businesses. This innovative approach allows organizations to harness the full potential of computer vision technology with unprecedented efficiency and affordability.

InferKit provides both a web interface and an API for advanced AI-driven text generation. Whether you're a writer seeking creative ideas or a developer building applications, InferKit has something beneficial for you. Its text generation capability uses sophisticated neural networks to predict and generate the continuation of the text you input. The system is highly adjustable, allowing for the creation of varying lengths of content on virtually any subject matter. You can access the tool through the website or via the developer API, making it easy to integrate into your projects. To begin, simply register for an account. There are many innovative and entertaining applications of this technology, including crafting narratives, poetry, and even marketing content. Additionally, it can serve practical functions like auto-completion for text inputs. However, it's important to note that the generator can only process a limited amount of text at once, specifically up to 3000 characters, meaning that if you input a longer piece, it will disregard the earlier portions. The neural network is pre-trained and does not adapt or learn from the provided inputs, and each interaction requires a minimum of 100 characters to process effectively. This makes it a versatile tool for a wide range of creative and professional endeavors.

Our systems are globally implemented to ensure optimal response times for users everywhere. You can easily incorporate our OpenAI-compatible API into your application with minimal effort. Start the integration process in mere minutes and efficiently scale it to accommodate millions of users. Take advantage of our extensive scaling capabilities and performance enhancements, which allow our API to be four times more cost-effective than the OpenAI GPT-3.5 API. Experience the ability to generate text and engage in conversations with our AI model, which provides ChatGPT-level performance while being significantly more affordable. Getting started is a quick process, requiring only a few minutes with our API. Additionally, tap into the capabilities of one of the most advanced AI image models to produce breathtaking, high-quality images, graphics, and illustrations in just seconds, revolutionizing your creative projects. This approach not only streamlines your workflow but also enhances your overall productivity in content creation.

Trustwise is a comprehensive API designed to harness the full potential of generative AI in a secure manner. While contemporary AI technologies are immensely powerful, they often face challenges regarding compliance, bias, data security, and managing costs. Trustwise offers a streamlined, industry-specific API that promotes trust in AI, aligning business goals with cost-effectiveness and ethical practices across various AI tools and models. By utilizing Trustwise, organizations can confidently push the boundaries of innovation with AI. Developed over two years in collaboration with top industry experts, our platform guarantees the safety, strategic alignment, and cost efficiency of your AI projects. It actively works to reduce harmful inaccuracies and safeguards sensitive data from unauthorized access. Additionally, Trustwise maintains thorough audit records to facilitate learning and improvement, ensuring traceability and accountability in all interactions. It promotes human oversight in AI decision-making while supporting continuous adaptation of systems to enhance performance. With integrated benchmarking and certification aligned with NIST AI RMF and ISO 42001, Trustwise stands at the forefront of responsible AI implementation. This ensures that organizations can navigate the complexities of AI deployment with confidence and integrity.

Step into the remarkable realm of AI-driven image creation with our innovative API. This tool enables you to effortlessly integrate leading AI image generation platforms into your applications, thereby unlocking their complete potential along with advanced drawing capabilities. Enjoy a complimentary 30-day trial without the need for credit cards or subscriptions. The API features a user-friendly syntax that promotes easy comprehension and implementation. ImaginePro grants you unrestricted access to a variety of functionalities offered by mainstream AI platforms, including text-to-image, image-to-image, image-to-text, inpainting, zooming, upscaling, panning, and much more. Feel free to produce an unlimited number of images whenever inspiration strikes. We are committed to continuously enhancing our API to ensure you receive the finest experience possible. Additionally, dedicated support is available to assist with API setup for all subscribed users through our interactive Telegram group. Users across various industries are leveraging ImaginePro to elevate their designs for marketing campaigns, social media content, and business initiatives, showcasing the versatility and power of AI in creative projects. Join the growing community and explore the endless possibilities that await you.

Developers should not waste time juggling AI APIs to perform essential tasks such as OCR, translations, sentiment analysis, PII removal, and text summarization. Intelligent API streamlines the process, allowing you to integrate AI-driven functionality into your apps and APIs with no complexity, hidden costs or runaway expenses. AI-Powered Smart Endpoints Document OCR – Extract text from receipts and invoices. Also, extract text from identity documents. Language Detection and Translation - Detect any language in a text or translate between 75+ different languages with ease. PII protection - Identify and redact personally identifiable data (PII) in any text by making a single phone call. Text Insights: Analyze sentiments or create concise summaries of long-form texts. Start instantly with 200 free credits.

Utilize an API that leverages Google's advanced AI technologies to transform text into natural-sounding speech. With the foundation laid by DeepMind’s expertise in speech synthesis, this API offers voices that closely resemble human speech patterns. You can choose from an extensive selection of over 220 voices in more than 40 languages and their various dialects, such as Mandarin, Hindi, Spanish, Arabic, and Russian. Opt for the voice that best aligns with your user demographic and application requirements. Additionally, you have the opportunity to create a distinctive voice that embodies your brand across all customer interactions, rather than relying on a generic voice that might be used by other companies. By training a custom voice model with your own audio samples, you can achieve a more unique and authentic voice for your organization. This versatility allows you to define and select the voice profile that best matches your company while effortlessly adapting to any evolving voice demands without the necessity of re-recording new phrases. This capability ensures your brand maintains a consistent audio identity that resonates with your audience.