Serra (YC S23)

SweetTalk AI offers AI companions with real personalities, real photos, and real conversations. These companions are available any time, endlessly patient, and entirely personalized to the user. The platform uses cutting-edge Flux LoRA models to generate photorealistic and unique companion images, remembers everything you say with persistent memory, and is always online without judgment.

PlanCheckerPro is a plan review tool built for architects, contractors, designers, and permit expeditors. Users upload a PDF plan set, enter a project address, and receive a categorized punchlist of potential code issues before submitting to the building department. The review checks drawings against ICC standards including IBC, IFC, IMC, and IPC, plus jurisdiction-specific codes where applicable, including Title 24, CALGreen, NFPA 13 and 72, ADA accessibility standards, and ASCE 7. Results are organized into categories that mirror how building departments route submittals across disciplines: structural, fire protection, mechanical, plumbing, accessibility, energy compliance, and site. Each finding is tagged by severity: Critical, High, Medium, or Minor. The punchlist is shareable via link without requiring recipients to log in. Team plans include collaboration tools, comments, and punchlist tracking. A free preview run is available with no credit card required. Paid plans start at $41.30 per month.

AnswerThis is an all-in-one AI research assistant built for students, academics, scientists, consultants, and professionals who need faster, smarter, and citation-backed research workflows. Unlike generic AI tools, AnswerThis is designed specifically for academic and scientific work—helping users search evidence, analyze literature, write drafts, organize sources, and uncover research gaps in one platform. With access to a database of 300M+ research papers, AnswerThis helps users instantly find credible sources, summarize complex topics, and generate structured outputs such as literature reviews, case studies, reports, and research drafts. Every output is backed by citations, making it ideal for serious research where accuracy and source transparency matter. Key Features: 1. AI Literature Reviews Generate comprehensive, publication-style literature reviews in minutes with line-by-line citations linked to source papers. 2. Advanced Evidence Search Search across 300M+ papers using intelligent filters to find top journals, relevant studies, and trustworthy evidence quickly. 3. Research Gap Finder Identify unexplored topics, missing angles, and future opportunities in your domain using AI-powered gap analysis. 4. AI Writing Assistant Draft papers, grants, case studies, slides, and rebuttals with built-in source support and smart editing tools. 5. Citation Management Supports 2000+ citation styles including APA, MLA, Chicago, and more for seamless academic formatting. 6. PDF Chat & Library Upload PDFs, chat with documents, extract insights, and keep all papers organized in one searchable research library. 7. Bibliometric Analysis Track top authors, trending keywords, journals, impact metrics, and concept relationships in your field. 8. Data Extraction & Export Extract methodology, findings, outcomes, and key details into structured tables or CSV files for analysis. 9. Collaboration Ready Create shared folders, workspaces, and team libraries for research groups and organizations. 10. Enterprise Grade Security Ideal for pharma, biotech, and regulatory teams with secure workflows, compliance-first systems, and private data handling. Why Users Love AnswerThis: * Saves hours of manual literature searching * Produces accurate, source-backed academic content * Replaces multiple tools with one workflow * Helps students complete dissertations and theses faster * Supports researchers with real evidence, not generic AI guesses * Great for universities, medical professionals, consultants, and R&D teams Best For: Researchers, PhD scholars, university students, professors, healthcare professionals, biotech teams, consultants, policy analysts, and anyone doing evidence-based writing or analysis. AnswerThis is one of the most complete AI research platforms available today. If your work depends on papers, citations, evidence, or academic writing, this tool can dramatically improve productivity while maintaining research quality and credibility.

Banana AI is an AI image generator that allows users to create AI images by chatting without the need for prompt engineering. It is designed specifically for e-commerce, creators, and marketers, enabling them to generate images easily and efficiently. The platform offers a free start to users, making AI image creation accessible and straightforward.

LocalRAG is an AI chat tool designed for interacting with various document formats such as PDFs, EPUBs, and Word documents. It emphasizes on-device processing to ensure user privacy and is available on iOS devices, providing a secure and private way to chat with your documents.

KikiVoice is a free, creator-first AI voice cloning + TTS platform. No sign-up—upload a few seconds of audio, paste text, and generate natural voiceovers in minutes with up to 99% similarity. Pick 3 built-in models: Kiki Core (fast & stable), Kiki Pro (emotion + advanced controls), and Kiki Multilingual (75+ languages + accents). Seamlessly switch models for drafts, pro production, and multilingual localization.

The Javascript to Typescript Converter with ChatGPT is a tool that allows users to quickly and easily convert Javascript code into Typescript. By leveraging AI technology, the tool automates the conversion process, saving users time and effort. The tool offers a simple and intuitive user interface where users can paste their Javascript code into a designated code box. After clicking the "Convert Now" button, the AI algorithm takes over and performs the conversion in a matter of seconds. Once the conversion is complete, users can easily copy the resulting Typescript code from the output box. Additionally, users have the option to start over with new code if needed. Developed by Yuval Suede, this tool aims to streamline the process of migrating Javascript projects to Typescript, allowing developers to take advantage of the benefits that Typescript offers, such as static typing and enhanced code safety.Overall, the Javascript to Typescript Converter with ChatGPT offers a convenient solution for developers looking to convert their Javascript codebase to Typescript with speed and efficiency.

Eye2.AI is a powerful AI comparison tool that aggregates responses from leading large language models like ChatGPT, Claude, and Gemini, so you can instantly compare their answers side by side. Designed to increase confidence in AI-generated content, Eye2.AI highlights points of agreement and disagreement between models, helping users make smarter, more informed decisions. Free to use with no login required, it's ideal for researchers, developers, students, and anyone who wants trustworthy AI insights, fast.

BeatVids is an AI-powered beat-synced video generator for music producers, DJs, and indie artists. Upload any audio file, and the AI automatically detects the drop using advanced BPM analysis. Choose from 28 genre-specific visual styles and export a professional MP4 video in about 60 seconds — entirely in your browser. No editing skills, no downloads, no ffmpeg. Post directly to TikTok, Instagram Reels, or YouTube Shorts. Free to start with 2 exports/month. Pro plans from $4.99/month.

Gemini Omni is a unified AI video and image generator at https://omni-gemini.ai/ that combines text-to-video, image-to-video, and image editing in one prompt. Gemini Omni renders 4K cinematic clips with synchronized audio — Foley, ambience, score, and lip-synced dialogue all generated in the same pass as the visuals, not added by a separate text-to-speech step. Key features of Gemini Omni: - Native 4K output with locked character continuity across cuts and aspect ratios - Conversational in-chat editing — describe the change in plain English, only that region rewrites - Multilingual typography across 30+ scripts - Multiple aspect ratios from one prompt (16:9, 9:16, 1:1, 21:9) - Combines text, image, audio, and video references in a single brief Is Gemini Omni free? Yes — Gemini Omni Free tier comes with daily credits and no credit card required, giving access to text-to-video, image-to-video, and conversational editing. For commercial license, watermark-free output, and higher credit volume, paid plans start at $7.9/month. Built for marketers, e-commerce teams, indie filmmakers, course creators, and founders, free Gemini Omni is a no-friction way to test before subscribing. Start at https://omni-gemini.ai/

Musci – AI Song Generator transforms text prompts and lyrics into studio-quality tracks for content creators and musicians. The platform offers a comprehensive toolkit including an AI lyrics generator, vocal isolator, and song cover creator across 100+ musical styles. Produce unique, royalty-free audio for commercial use without needing musical experience or expensive studio equipment. It simplifies music production by generating professional songs instantly from simple descriptions.

VidpexAI is a free all-in-one AI platform that enables users to generate and edit images and videos from text or images. It supports advanced features such as AI face swap, video effects, and AI visual creation, making it accessible without requiring any technical skills.

LTX-Video by Lightricks is the first DiT-based real-time AI video generation model that enables users to create stunning videos in seconds. It offers open-source, fast, and professional quality solutions for both text-to-video and image-to-video generation, making video creation accessible and efficient.

Omni Flash is an AI video generation platform designed to collapse the multi-tool video production pipeline into a single rendering engine. Where traditional AI video workflows require chaining separate tools for frame generation, lip-sync, audio scoring, and final compositing, Omni Flash produces all four together in one pass — accepting a text prompt, a reference image, or an existing video clip as input, and returning a finished cinematic scene with picture, motion, dialogue, and score already in sync. The platform supports three primary workflows. Text-to-video accepts a natural-language scene description and generates a finished clip. Image-to-video animates a reference still with motion that respects the original composition. Conversational video remixing takes an existing clip and modifies it through chat prompts — changing wardrobe, swapping locations, or extending shots without re-rendering from scratch. Each Omni Flash generation can incorporate up to nine image references, runs up to fifteen seconds in length, and outputs at resolutions up to 4K with native synchronized audio, dialogue, and lip-sync. Several capabilities distinguish Omni Flash from single-purpose AI video tools. Locked character consistency allows a face, wardrobe, or brand asset to be pinned once and preserved across every subsequent shot, including between separate generations made days apart — making it viable to carry a single lead character through an entire short film, ad campaign, or product series without retraining. The model understands film grammar natively, parsing cinematographic vocabulary like focal length, depth of field, motivated lighting, tracking shots, dollies, and racks. Direction can be given the way a cinematographer would brief a crew, rather than through guessed prompts. Refinements happen through natural-language chat, with the model rewriting only the requested change while leaving the rest of the composition intact. Looks can be saved as style presets that carry palette, grain, and motion feel into future projects. Most Omni Flash previews return in under a minute, which makes it practical to explore several creative directions before committing to a final cut. The platform is used by independent filmmakers for pre-visualizing scenes before scouting locations, marketing teams for producing campaign hero cuts and localizing them across markets, ecommerce brands for turning product photography into sound-on motion content, course creators for building short explainer sequences that align with narration, agencies for pitching multiple concepts already mocked up in motion, music video directors for multi-scene narratives, and game studios for cutscene mockups and animation first passes.

Coralflavor is a secure, private AI chat platform designed exclusively for adults. It offers unfiltered, uncensored AI chat without safety alignment or filters, allowing users to ask anything, explore ideas freely, and receive honest answers in a private and anonymous environment.

Homesage.ai is an AI-powered real estate platform that delivers cutting-edge insights on 150M+ U.S. residential properties to investors, realtors, lenders and IT developers. The company uses computer vision and advanced AI models to identify investment opportunities, generate full property reports, and provide well-documented real estate and home improvement APIs. It also offers custom AI solutions for the real estate, financial, and insurance industries.

FormRoyale is survey software designed to help teams quickly create employee and customer surveys, collect honest feedback, and analyze results in real time. It enables users to build customizable surveys without technical skills, view live response data, and make data-driven decisions to improve workplace culture and customer satisfaction.

SeedanceGen AI Video Generator by ByteDance allows users to create AI-generated videos from text or images using advanced models such as Seedance 2.0, Seedance 1.5 Pro, Veo 3.1, and Kling 3.0. It offers a powerful platform for transforming textual or visual inputs into dynamic video content, leveraging cutting-edge AI technology for creative video generation.