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Parade logo

Parade

YCombinator

Launch your company without hiring a designer

Through a series of simple questions, Parade’s machine learning-based software helps startup founders articulate the vision for their company, translate it into a design aesthetic, and launch it online in under 10 minutes. Parade makes it easy to create a website, marketing emails, social media posts, and more, all without a graphic designer.

B2BSeattle, WASaaSB2BDesign Tools
ParadeDB logo

ParadeDB

YCombinator

Unify application data, vectors, and full-text search in one Postgres

Search without a second system. One Postgres for your application data, full-text search, vector retrieval, and aggregations.

B2BSan FranciscoDeveloper ToolsAnalyticsOpen SourceInfrastructureDatabases
Paragon AI logo

Paragon AI

YCombinator

Turns your sales calls into CRM data, automatically.

Paragon AI is a tool for sales representatives which automatically turns call recordings into structured information that directly updates the CRM. Instead of spending hours going over call recordings to pull out key information to populate the CRM, sales representatives can focus their time doing what they do best and sales leaders can rest assured that pipeline data is up to date.

B2BNew York City, NYSaaSB2BProductivitySalesAI
Parahelp logo

Parahelp

YCombinator

Build an AI support agent that securely uses all your tools

Build and run an AI support agent that resolves even your most complex tickets end-to-end. If a tool has an API, you can securely connect it to your agent - just by chatting with Parahelp. For example, you can connect Stripe so your agent can resolve billing questions and refund requests.

B2BSan FranciscoCustomer SuccessCustomer ServiceCustomer SupportAIConversational AI

Parakey

YCombinator

Parakey was founded in early 2006 by Blake Ross and Joe Hewitt of Mozilla/Firefox fame. Little has been revealed about what Parakey will actually do, but it has been touted as both a platform and set of applications that will merge the desktop environment with the Web. It has also been described as a Web-based operating system. Great emphasis has been placed on Parakey's potential to make tasks on the computer more intuitive for the average Joe. Parakey was acquired by Facebook on July 19, 2007. Sequoia Capital seeded Parakey's operations in early 2005.

B2BSan Francisco
Parallel Bio logo

Parallel Bio

YCombinator

Using the immune system to cure disease

Parallel Bio is pioneering human-first drug discovery by creating the first map of human biology. Using groundbreaking biological and computational tools that track real clinical outcomes, the company generates data that enable earlier, more reliable decisions about disease biology and drug development. Parallel Bio’s platform overcomes the core limitations of traditional animal testing, which fails to encapsulate the complexity of human biology. The company is building internal pipelines of novel disease targets and drug candidates in both cancer and autoimmune disease, while collaborating with pharmaceutical companies to evaluate therapies directly in human systems to reduce the cost and risk of clinical trials. Based in San Francisco, the company was founded in 2021 by two of the world’s leading experts in replacing animal models with human-first platforms.

HealthcareSan FranciscoAI-powered Drug DiscoveryBiotech

Parallel Universe

YCombinator

Helping developers scale their applications with ease.

Parallel Universe, a Y-Combinator startup, helps developers utilize the most out of their hardware. With a server side stack developed for easy concurrency programming, you can ditch the extra servers and write simple multi-threaded code.

B2BDevOpsCloud Computing
Parametric logo

Parametric

YCombinator

Physical businesses that run themselves

Parametric builds autonomous physical businesses.

IndustrialsSan Francisco
ParaQuery logo

ParaQuery

YCombinator

Managed GPU-accelerated Spark + SQL at 2x speed and half the cost

ParaQuery is a fully-managed GPU-accelerated Spark solution providing double the performance at half the cost compared to solutions like Databricks and BigQuery. It is fully Spark-compatible, cloud agnostic, and has seamless integrations everywhere, all without vendor lock-in. ParaQuery makes it trivial to run large SQL and Spark workloads efficiently and serverlessly, without any data migrations.

B2BNew York City, NYDeveloper ToolsAnalyticsBig DataEnterprise SoftwareInfrastructure
Parasma logo

Parasma

YCombinator

Training human brain cells for AI compute

We write the algorithms to turn brain cells into compute.

San FranciscoSummer 2026ActiveMachine LearningNeurotechnologyAISan Francisco
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