Venture-Backed Startups

Hyper provides an AI voice agent that autonomously handles non-emergency 9-1-1 calls, resolving up to 75% of them so human call takers can focus on critical emergencies. Built for public safety answering points (PSAPs), it integrates with existing Call Handling Systems, CAD, and RMS, and offers multi-lingual interactions, real-time analytics, and records compliance.

4 investors

Call Levels develops a mobile application for monitoring financial assets. It tracks prices across stocks, commodities and indices and sends automatic notifications when user-defined levels are reached, serving both individual investors and financial institutions.

1 investor

Call Simulator builds AI-powered role play simulation software for professional communication training, using large language models and AI voice to generate dynamic, responsive training conversations. It serves enterprise, public sector, and 911 emergency dispatch training programs, with technology used across more than 1,000 emergency dispatch centers via a partnership with Priority Dispatch.

2 investors

Call2Action provides an AI-driven recruitment platform for hiring commercial drivers, handling phone and video interviews, pre-employment screening (CDL, MVR, carrier history, FMCSA compliance, drug tests), and automated onboarding with contracts and digital signing. It is aimed at fleet operators looking to recruit and hire drivers, and integrates with existing applicant tracking systems.

1 investor

Connectivity is a B2B telecommunications operator offering fiber and mobile data solutions through a network of professional distributors, with specialized services for the tourism sector across 5+ countries. UNIQUE provides telecommunications expense management and optimization software that helps enterprises reduce telecom costs by an average of 32% without changing operators.

1 investor

Call4USA has developed a patented process that combines telephony and money transfer into a single solution aimed at U.S. Hispanics of Mexican descent and their families in the U.S. and Mexico. The pre-revenue startup holds patents granted in 2019 and 2021 and is preparing its telephony and money transfer products for commercialization.

0 investors

Call811 provides a public service for locating buried utilities before digging, directing homeowners and professional contractors to submit locate requests a few days in advance. It offers guidance and request submission tools for safe digging practices to prevent damage to underground utility lines in the U.S.

1 investor

Call9 provides emergency and palliative care to patients in skilled nursing facilities by combining onsite clinical care specialists with remote emergency medicine physicians who evaluate and treat patients via a proprietary platform, reducing response times from an average of 64 minutes to immediate care.

2 investors

Callab provides AI voice agents for enterprise contact centers that integrate with existing PBX, SBC, and telephony infrastructure via SIP without migration. The platform handles inbound support, outbound campaigns, appointment scheduling, and lead qualification with real-time human supervision, call recording, transcription, CRM integration, and compliance controls.

2 investors

Calla Lily Clinical Care is a women's health company developing intravaginal drug delivery products based on its proprietary Callavid platform device, targeting IVF, prevention of preterm birth and miscarriage, delivery of live biotherapeutics to restore the vaginal microbiome, and biomarker sample collection for diagnostics such as endometriosis. Its FDA-cleared device technology serves the women's health and medical device market.

1 investor

CallApp is a free caller ID and call blocker mobile app that identifies unknown numbers, blocks unwanted calls and messages, records calls, and blacklists spam numbers. It draws on a database of over 8 billion phone numbers and enriches contacts with information from social media platforms.

2 investors

Callara is a platform for 340B pharmacies, FQHCs, and clinics that logs drug decisions at the point of care, tracks them to the pharmacy fill, and verifies capture. It surfaces eligible OTC benefits, provides drug price intelligence factoring in 340B, patient assistance, formularies, and sliding scales, and offers a unified patient-messaging hub with AI-assisted responses.

1 investor

Callback was a Web3 company focused on driving blockchain adoption in Japan and building a community around it. The company announced it was shutting down in 2025.

1 investor

Callback provides AI-powered workflow automation and process orchestration for enterprises, handling complex operational tasks like KYC, data reconciliation, and multi-source ETL pipelines. The platform integrates with existing infrastructure to serve as a system of record for complicated, real-world business processes.

1 investor

Callback Technologies develops SDK components and prebuilt kernel-mode drivers that let developers add virtual filesystems, file filtering, transparent encryption, file sync, cloud storage mounting, and network packet capture to applications without writing kernel driver code. Its products (the CBFS line and PCAP Filter) target software engineering teams and enterprises, with APIs available in .NET, C++, Java, Python, Go, Rust, and other languages across Windows, Linux, and macOS.

0 investors

Callbook AI provides AI agents that contact and negotiate with borrowers across calls, SMS, and email to handle debt collections. It segments accounts by ability and willingness to pay and routes customers to the right next step, serving financial institutions.

1 investor

0 investors

Calldesk provides a low-code platform for building, testing, deploying, and monitoring AI voice agents that automate customer calls in contact centers. It serves enterprise customer service teams, integrating with existing CRM, ERP, and support systems to handle tasks such as FAQs, call routing, and identity verification.

1 investor

0 investors

Callers offers an AI agent platform that handles omnichannel customer conversations, executing pre-call, mid-call, and post-call actions across support and sales workflows. It provides AI voice agents and integrates with over 610 existing business systems, with setup and optimization support from a customer success team.

1 investor

CallFire provides text messaging and voice calling tools that businesses use to send appointment reminders, personalized bulk messages, and track advertising and lead-generation campaigns. Its platform is aimed at companies looking to engage customers, manage prospect lists, and accelerate collections.

1 investor

CallHippo is a cloud-based business communication platform offering a VoIP phone system, call center suite, AI voice agents, conversation intelligence, and omnichannel messaging with virtual numbers in 150+ countries. It serves small businesses through enterprises across industries such as financial services, healthcare, recruitment, real estate, and legal.

1 investor

Calliditas develops novel therapeutics for orphan indications, with an initial focus on renal and hepatic rare diseases. Its products include TARPEYO (budesonide) delayed release capsules and Kinpeygo.

2 investors

0 investors