BookSolid Alternatives

A personal AI that can act on direct commands and run persistent directives for you, via voice and text.

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Tivara

AI Tools

Tivara is a SaaS solution focused on Artificial Intelligence, SaaS, B2B. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Tivara offers scalable solutions for teams of all sizes.

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Undermind

AI Tools

At Undermind, we're building a search engine that can handle extremely complex questions. It’s geared at experts, like research scientists and doctors, who need to find very specific resources to solve high-stakes problems. We’ve rebuilt search from the ground up to address this. Our new approach employs high-quality LLMs to adaptively explore a database, mimicking how a human researcher carefully discovers information. This approach dramatically outperforms (by 10-50x) traditional keyword search and other modern AI-based retrieval methods. Our first target users are the 50 million researchers searching for scientific literature on PubMed and Google Scholar every month. We’ve have paying users across fields like medicine, ML, biotech, finance, and more.

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Redouble AI

AI Tools

Redouble AI is the solution to scale human-in-the-loop for AI workflows in regulated industries. Instead of having to rely on slow and expensive human reviewers, Redouble’s clients save 80% of staff costs and significantly improve the accuracy and quality of their outputs by integrating our tool into their workflows. Addressing an $11BN market, the company is already generating revenue with its first set of clients. The founders are two serial entrepreneurs (who have built successful companies in AI and health-tech respectively) and a data engineering veteran who has written more than 120 enterprise-grade software applications.

Enterprises are paralyzed by the risks of deploying generative AI. Traditional methods like RAG and fine-tuning are brittle, expensive, and fail to prevent costly hallucinations or guarantee compliance in high-stakes environments. This lack of trust stalls innovation and blocks ROI. CTGT ensures strict, auditable adherence to your policies on the fly. We deliver defensible audit trails and remediate noncompliant model behavior, so outputs become more aligned with company policies over time, combating data and model drift. CTGT is backed by Google's AI fund (Gradient), General Catalyst, and luminaries like Paul Graham. We provide the control and confidence necessary to unlock the full potential of enterprise AI.

Fractal Labs is a SaaS solution for businesses. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Fractal Labs offers scalable solutions for teams of all sizes.

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Guide Labs

AI Tools

At Guide labs, we build Interpretable foundation models and AI systems that can reliably explain their reasoning, and are easy to audit, steer and understand. We provide access to these models via our API.

Pumpkin is a SaaS solution focused on Artificial Intelligence, Automation. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Pumpkin offers scalable solutions for teams of all sizes.

Overeasy is a SaaS solution focused on Artificial Intelligence, Generative AI, AI. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Overeasy offers scalable solutions for teams of all sizes.

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Andon Labs

AI Tools

Safety from humans in the loop is a mirage. We evaluate, research, and apply AI control in our own real-world deployments of autonomous organizations. We are building the Safe Autonomous Organization. We iteratively launch and scale autonomous organizations, while bridging AI control research with real-world testing.

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Elevate

AI Tools

Elevate is bringing AI to private equity-backed roll-ups. For example, one of our customers is Guardian Restoration Partners, which is backed by Alpine Investors, the leading roll-up focused private equity firm. In three months, we integrated 10 acquisitions and enabled them to pilot AI agents built on top of our data warehouse. We know this problem personally. Before Elevate, Scott was a Vice President at a $15B private equity firm where he was leading a roll-up. Steve and Jeff are both software engineers with backgrounds across finance, big tech, and start-ups. The founding team has been friends for over a decade from their Duke undergraduate days.

Glimmer is a new way to search massive PDFs using AI. If you've ever dealt with massive PDFs (i.e. over 1,000 pages), you know how broken search can be. You have no choice but to use “Cmd-F” and manually sift through thousands of search results to find specific information. Professionals in construction, law, finance, and healthcare spend hours doing this every day. Glimmer makes searching these large documents 10x easier. When you upload a PDF, Glimmer uses AI to intelligently index your documents. You can then search your PDF in natural language and get answers with verifiable page sources. You can get started with Glimmer for free with any kind of PDF at withglimmer.com.

dmodel is a SaaS solution focused on Artificial Intelligence, Generative AI, AI. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, dmodel offers scalable solutions for teams of all sizes.

Zeroframe is a SaaS solution focused on Artificial Intelligence, Machine Learning. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Zeroframe offers scalable solutions for teams of all sizes.

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Capitol AI

AI Tools

Capitol builds intelligence infrastructure for companies overwhelmed by data but starved for clarity. Today, 80% of enterprise AI projects fail because outputs aren't accurate, attributable, or usable. Capitol AI works with companies in high-stakes industries to turn information into intelligence that drives decisions with model-agnostic, purpose-built infrastructure. Capitol is building a different future - one where institutions, creators, and analysts stay in control of their knowledge, their IP, and their value. We deliver a model-agnostic platform that turns complexity into decision-grade insight. We don't believe the future should be dictated by a handful of closed models. We enforce attribution, minimize hallucinations, and preserve temporal accuracy - giving companies trusted answers they can act on.

Rescale is a cloud-based platform for computational engineering and R&D, that empowers engineers and researchers to accelerate discovery, testing, and optimization. We democratize access to the latest technologies that drive greater efficiency and competitiveness, including high performance computing, simulation, modeling, AI/ML, and digital twins. The majority of industry leaders worldwide use Rescale as the backbone of R&D, connecting the digital thread of new product innovation to develop products that enrich humanity, from autonomous vehicles to drug discovery. Rescale customers include 7 of the top 10 automotive companies and 3 of the top 6 life science companies. Rescale’s full-stack, open platform automates systems, data, and workflows into a user-centric experience, so customers can focus on innovation. Choose from 1000+ pre-installed applications for multiphysics simulation and AI/ML-assisted design exploration, including commercial, open-source, and custom software. We offer the largest global network of hyperscale and specialty cloud infrastructure to leverage the latest CPU, GPU, and other specialized architectures. Rescale is enterprise-ready to enable any size organization to achieve their digital transformation goals–with unified management that gives IT teams full visibility and control of hybrid-cloud operations. Rescale’s intelligent automation gives customers flexibility to improve performance and reduce costs of computing, while our enhanced security and compliance ensures industry-leading standards are met from end to end. Getting started is simple, flexible, and free to try. Our team of experts is ready to help you achieve your most ambitious engineering goals – schedule a demo today. Join us and help us build products that change the world: www.rescale.com/careers

Launched in 2012 as ZenPayroll, Gusto serves more than 300,000 businesses nationwide. Each year we process tens of billions of dollars of payroll and provide employee benefits—like health insurance and 401(k) accounts—while helping companies create incredible work places. Through one refreshingly easy, integrated platform, we automate and simplify your payroll, benefits, and HR, all while providing expert support. You and your employees will get the peace of mind you need to do your best work.

FamilyLeaf is a private place to share your life with your family. You create a private page where your family can easily share photos, share life updates, store contact information, and post messages. Our mission is to bring families around the world closer together. Family is the most irreplaceable but overlooked social network; we want to help you share the little things that build a lifetime of love!

Simple to set up, on demand game servers. Minefold runs game servers for popular games such as Minecraft and Team Fortress 2. Servers can be created and running in under 30 seconds and players pay by the hour.

Zipio is a SaaS solution focused on Marketplace. Founded by Y Combinator alumni, this platform provides innovative tools and services to help companies streamline their operations and achieve their goals. Built with modern technology and user experience in mind, Zipio offers scalable solutions for teams of all sizes.