AssemblyAI provides speech AI APIs that transcribe and extract insights from audio to make voice data searchable and actionable. The company delivers cloud-hosted speech-to-text and audio intelligence capabilities—including summarization, sentiment analysis, topic detection, content moderation, and PII redaction—via developer APIs and a no-code playground. Its technology stack centers on proprietary speech recognition models and LLM-based frameworks (e.g., LeMUR) for applying large language models to transcriptions. AssemblyAI operates as a B2B SaaS/API provider serving developers and companies such as CallRail, Fireflies, and Spotify. The platform targets voice-data use cases across contact centers, media, and analytics with integrations appropriate for product and developer workflows.
AssemblyAI provides speech AI APIs that transcribe and extract insights from audio to make voice data searchable and actionable. The company delivers cloud-hosted speech-to-text and audio intelligence capabilities—including summarization, sentiment analysis, topic detection, content moderation, and PII redaction—via developer APIs and a no-code playground. Its technology stack centers on proprietary speech recognition models and LLM-based frameworks (e.g., LeMUR) for applying large language models to transcriptions. AssemblyAI operates as a B2B SaaS/API provider serving developers and companies such as CallRail, Fireflies, and Spotify. The platform targets voice-data use cases across contact centers, media, and analytics with integrations appropriate for product and developer workflows.
What they do: Speech AI APIs for transcription and audio intelligence (summarization, sentiment, moderation, PII redaction, etc.)
Founded: 2017
HQ: San Francisco, CA
Total funding: ≈ $115M
Core customers: Developers and enterprises (examples: CallRail, Fireflies, Spotify)
Related Companies
Company
HQ
Industry
Total Funding
Count
🇬🇧GB
Data and Analytics
$5M
Clarity AI
🇺🇸US
Sustainability
$98M
PhysicsX
🇬🇧GB
Data and AnalyticsDeepTechInformation TechnologySoftware
$187M
ELSA, Corp
🇺🇸US
Education
$25M
Nscale
🌍Remote
Data and AnalyticsDeepTechHardwareInformation TechnologyInternet ServicesSoftware
$155M
Company Overview
Problem Domain
Speech recognition and speech understanding for developers and enterprises across contact centers, media, and analytics.
Founded
2017
Industry
Software Development
Tech Stack
Proprietary speech models
LLM-based frameworks
Funding Track Record
Series A- 2022-03-04
$28M
Series A announced March 4, 2022 with participation from Y Combinator, John & Patrick Collison, Nat Friedman, and Daniel Gross
Series B- 2022-07-14
$30M
Series B announced July 14, 2022
- 2023-12-04
$50M
December 4, 2023 round; brought disclosed total capital raised to roughly $115M
Investor Signal
“Backed by top-tier VCs and notable angels (Accel, Insight Partners, Y Combinator, Nat Friedman, Daniel Gross, John Collison)”
Founders
What we do
Join the Team
API Support Engineer
RemoteRemote (Europe, UK)
Remote • Remote (Europe, UK)
Who you are
6 months+ of experience in a similar support role
Prior customer or client-facing experience, ideally in a high-growth startup environment
Some technical experience; ideally from a coding bootcamp or past software engineering job
Ability to understand and translate technical language across both clients & engineering teams
Experience working with REST APIs
You can demonstrate and explain API knowledge
You can hear a use case and creatively apply our API functionality to solve that use case
Super organized
Outgoing; loves to communicate with external stakeholders and customers
You take ownership of customer feedback
Ability to master our API's functionality
What the job involves
AssemblyAI is growing quickly, and we’re searching for a driven and dedicated API Support Engineer to work on our multi-functional team
Benefits
Home office stipend: We invest in our people first and offer competitive salaries across all roles andEvery new team member gets U$1,000 to improve their home office. We want to make sure everyone has the setup to do their best work. locations
Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.
Machine Learning Engineer
ContractBerlin, DE
Contract • Berlin, DE
Mobile Developer
Part-timeMunich, DE
Part-time • Munich, DE
Data Scientist
InternshipManchester, GB
Internship • Manchester, GB
Backend Developer
Full-timeTel Aviv
Full-time • Tel Aviv
Mobile Developer
Part-timeHamburg, DE
Part-time • Hamburg, DE
Product Designer
Part-timeHaifa
Part-time • Haifa
We're growing rapidly, and looking for someone who loves interacting with customers, and has enough technical experience to interact with developers to help troubleshoot their integrations with our API
Ideally, you've done a coding bootcamp, or served as a developer in a past role
With significant investment and strong leadership to fuel our growth, it’s the perfect time to join the AssemblyAI team
Be the first line of support AssemblyAI's customers. You'll work directly with new customers who are integrating our API to make sure their integration is going well. You'll also be responsible for checking in on current customers, notifying them about upcoming new features/product updates, and collecting any feedback they have
Serve as the "product expert". You'll be responsible for answering technical questions about the product over live chat, Slack, and email. We're a small team, and this will also be a great opportunity to wear multiple hats and to serve in a critical cross-functional role
Be the liaison between the customer and our engineering teams. You'll manage our ticketing system and serve as the liaison between the customer and our engineering team for bug reports, feature requests, and technical issues that are reported
Manage and contribute to our technical resources. You will make updates and improvements to our official documentation, contribute to our SDKs, and build and maintain third-party integrations
Equity: We want our team members to have skin in the game and an opportunity to see long-term returns on the hard work they are putting in. To that end, every team member receives a generous equity grant
Premium benefit offerings: We offer premium medical, dental, and vision plans and cover up to 100% of the premiums for both the employee and their family. We also offer opportunities to contribute to an HSA or FSA, short-term and long-term disability coverage, and life insurance
Unlimited PTO: We offer a flexible PTO policy to all team members and encourage everyone to take time off to recharge, do something fun, and spend time with loved ones
Team offsites: We have team and company-wide retreats in amazing locations to give everyone an opportunity to meet in person, collaborate, and build working relationships that make us a better team
Global remote team: We hire the best person for the job, regardless of location. Our remote-first culture allows team members to make an impact from anywhere in the world
Diversity and inclusion: We celebrate diversity and are committed to creating an inclusive environment for all employees. We are proud to be an equal-opportunity workplace
Flexible schedule: Strong teams are built on mutual trust and accountability. We believe in giving our team members ownership over their work and a flexible schedule to allow them to operate at their highest potential
