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Syllable

Sunnyvale, US · Founded 2016 · Delaware corporation · 55 employees on LinkedIn · 6 known investors

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Syllable is a platform for building, running, and optimizing production AI agents, offering a no-code conversational builder for domain experts and declarative configurations and APIs for engineering teams. It runs agents on multi-cloud infrastructure (AWS, GCP, Azure, OCI) with observability, governance, human-in-the-loop controls, and security for use cases such as voice automation, call center QA, internal copilots, and support agents.

AI & Machine LearningDeveloper ToolsEnterprise SoftwareSaaS

Founders & leadership

Syllable was founded in 2016 by Sarel Kobus Jooste.

SK
Sarel Kobus JoosteFounder
GM
Guilherme Medeiros BastosExecutive

Investors · 6

New Enterprise Associates (NEA)listed by New Enterprise Associates (NEA)Menlo Park · $200K – $40M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Oak HC/FTlisted by Oak HC/FTStamford

How we know: Oak HC/FT's portfolio page · a partner's Signal profile · funding news · vator.tv · open dataset · 5k.vc investor directory · Not right? Tell us

TCVreportedMenlo Park · $10M – $500M

How we know: a partner's Signal profile · funding news · vator.tv · Not right? Tell us

Also in the syndicate · 2

Section32Verily

Funding

SEC filings, press & company announcements

$53.2M disclosed across 2 of 5 rounds · 2018–2026

▶$13.2MraisedSep 2018 · 8 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Guilherme Medeiros BastosExecutive Officer
  • Sarel Kobus JoosteExecutive Officer, Director
Offering amount
$13.7M
Amount sold
$13.2M
First sale
Aug 2018
Incorporated
Corporation, Delaware, 2016
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Related companies · 4

SyllabySyllaby is an AI video generation platform that turns scripts into short-form and long-form faceless videos, offering AI voices, avatars, visual styles, subtitles, a built-in editor, and scheduling to platforms like YouTube, TikTok, Facebook, and LinkedIn. It targets content creators who want to produce and publish social video without appearing on camera.
GrammarlyGrammarly is an AI-powered writing assistant that helps users write with clarity and confidence across over 1 million apps and websites. The platform serves professionals, students, and teams through free and premium versions, and uses natural language processing to refine tone, suggest rewrites, and improve communication effectiveness.
TwilioTwilio provides a cloud-based communications platform that enables businesses to integrate voice, messaging, and video into applications using APIs. The platform combines communication channels, contextual data, and AI orchestration for enterprises and developers building customer experiences.
ZapierZapier provides a platform for connecting AI models and agents to workflows and business applications, enabling teams to automate tasks across over 9,000 apps without coding. The platform serves enterprises, operations teams, and businesses of all sizes looking to deploy AI-driven automation for lead capture, customer support, employee onboarding, and other business processes.

Companies working in the same space as Syllable.

In the news

Syllable.ai Raises $13.3 Million In Funding - OPEN MINDSopenminds.com · Sep 2018

Frequently asked questions

What does Syllable do?
Syllable is a platform for building, running, and optimizing production AI agents, offering a no-code conversational builder for domain experts and declarative configurations and APIs for engineering teams. It runs agents on multi-cloud infrastructure (AWS, GCP, Azure, OCI) with observability, governance, human-in-the-loop controls, and security for use cases such as voice automation, call center QA, internal copilots, and support agents.
Who founded Syllable?
Syllable was founded by Sarel Kobus Jooste in 2016.
Who are Syllable's investors?
Syllable's investors include MemorialCare Innovation Fund, New Enterprise Associates (NEA), Oak HC/FT, TCV.
How much funding has Syllable raised?
Syllable has disclosed $53.2M raised across 2 of its 5 known rounds.
Where is Syllable headquartered?
Syllable is headquartered in Sunnyvale, US.