Ready to build your own Founder-Led Growth engine? Book a Strategy Call
Frontlines.io | Where B2B Founders Talk GTM.
Strategic Communications Advisory For Visionary Founders
Rather than hiding their product behind NDAs, PolyAPI published detailed demos and documentation early. Darko explained, "We think that our domain and our product set is just so hard to copy and replicate... so we were never worried about competitors catching wind of what we're doing." This transparency helped enterprise buyers see that PolyAPI wasn't vaporware.
PolyAPI succeeded by focusing on enterprises that had already rejected low-code platforms and were building in-house solutions. This created a clear target market of sophisticated buyers who understood the limitations of existing solutions and were willing to adopt a new approach.
Instead of broad marketing campaigns, PolyAPI began with individual conversations to gather feedback, find alpha testers, and evolve into beta testing. This grassroots approach helped them refine their product and messaging before scaling up marketing efforts.
Out of 20 initial VC conversations, 19 passed, but Ross Mason (Mulesoft founder) immediately invested. Darko noted, "That kind of signal is really important because the one person who deeply understands the space was super excited to invest." This validated their approach and provided valuable strategic guidance.
Even six months after their latest round, PolyAPI is already preparing for Series A by maintaining relationships with 20+ VCs and working toward clear metrics. This ongoing engagement creates leverage for future fundraising by demonstrating consistent progress.
Building a New Category in Enterprise Middleware: PolyAPI’s Developer-First Approach
Enterprise middleware is a $30B+ market dominated by low-code platforms promising simple, drag-and-drop integration. But after 12 years building integration platforms at Mulesoft, Oracle, and Google, Darko Vukovic saw a critical gap: enterprises were rejecting these solutions in favor of building their own platforms internally.
In a recent episode of Category Visionaries, Darko shared how PolyAPI is creating a new category between traditional integration platforms and custom development, raising $5M to challenge conventional wisdom about enterprise connectivity.
The Problem with Low-Code Promises
Traditional integration platforms market themselves as simple solutions that anyone can use. “They’ve been largely branded as being low code, no code, drag and drop, you know, super easy. You just grab a couple of connectors, you draw a couple lines between them, and voila, you have your integration,” Darko explains.
But this promise falls apart for enterprise-scale integrations. “The reality is that’s just not how enterprise integrations work,” says Darko. “The big ones, the hairy ones, the stuff that carries millions if not billions of transactions, that stuff needs to be built much more robust way.”
This gap has forced many enterprises to build their own integration platforms internally. Darko discovered entire teams dedicated to building and maintaining custom middleware solutions – a clear sign of unmet market needs.
A Developer-First Alternative
Instead of following the low-code trend, PolyAPI took a controversial approach: embrace native code development. “What that means is that you can use native languages such as TypeScript, Python, Java, C Sharp to actually write the integration logic,” Darko explains.
This decision positioned PolyAPI to capture enterprises that had rejected traditional vendors’ limitations. “Many customers use Salesforce as a CRM, but every customer’s Salesforce CRM is going to be different,” notes Darko. Native code development gives teams the flexibility to handle these customizations without compromise.
Building Enterprise Credibility
Rather than hiding their product behind NDAs, PolyAPI took an unconventional approach to early marketing: radical transparency. “We think that our domain and our product set is just so hard to copy and replicate. So we were always publishing everything we’re doing to a pretty high degree of detail without giving away the magic sauce,” says Darko.
Their go-to-market strategy evolved through careful stages: “At first it was soliciting feedback on the idea, then it transitioned into soliciting people that might be interested in being alpha testers. And from alpha testers it transitioned into beta testers.”
This methodical approach helped overcome enterprise buyers’ skepticism about young startups. As Darko notes, “These buyers are savvy, they could see right through that. They know you can’t deliver a product in time that they’ll need it.”
Finding the Right Investors
PolyAPI’s unconventional approach initially faced skepticism from investors. Out of 20 early conversations with VCs, 19 passed. But one investor immediately understood the opportunity: Mulesoft founder Ross Mason.
“That kind of signal is really important because the one person who deeply understands the space was super excited to invest,” Darko reflects. This validation helped PolyAPI stay confident in their vision despite initial resistance.
The Road Ahead
Today, PolyAPI has 10 enterprise customers in production and is targeting 25-30 more in their next wave. Their vision extends beyond just integration – they aim to become the foundation for enterprise connectivity in an AI-driven future.
The company’s journey shows that sometimes the best enterprise products emerge from rejecting industry trends rather than following them. By focusing on developers’ real needs rather than low-code promises, PolyAPI is creating a new category in enterprise middleware that embraces rather than abstracts away complexity.
CEO & Founder of Vectara
Amr Awadallah, CEO & Founder of Vectara: $53 Million Raised to Build the RAG-as-a-Service Category
CMO of Coactive AI
The Siebel vs Salesforce Truth Every B2B Marketer Should Know
CEO of Mantium
Ryan Sevey, CEO of Mantium: $12 Million Raised to Help Teams Deploy and Monitor their AI Process Automations
CEO & Co-Founder of Tomato.ai
Ofer Ronen, CEO & Co-Founder of Tomato.ai: $12 Million Raised to Build the Accent Softening Category
CEO and Founder of Hume AI
Alan Cowen, CEO and Founder of Hume AI: Over $17 Million Raised to Measure and Improve How Technology Affects Human Emotion
CEO & Co-Founder of Forethought
Deon Nicholas, CEO & Co-Founder of Forethought: $92 Million Raised to Power the Future of Customer Support with AI
CEO of Bobidi
Jeong-Suh Choi, CEO Bobidi: Nearly $6 Million raised to Deliver Better, More Inclusive AI Solutions for Developers
CEO & Co-Founder of Maven AGI
Jonathan Corbin, CEO and Co-Founder of Maven AGI: $28 Million Raised to Build the Future of Customer Experience
CEO & Co-Founder of SuperAnnotate
Vahan Petrosyan, CEO & Co-Founder of SuperAnnotate: $53 Million Raised to Build the Future of AI Training Data Infrastructure
CEO of Trustero
Phillip Liu, CEO of Trustero: $8 Million Raised to Build the Future of Compliance AI
CEO & Co-Founder of Portrait Analytics
David Plon, CEO & Co-Founder of Portrait Analytics: $10M Raised to Build an AI-Powered Thought Partner for Institutional Investors
Founder & CEO of Tera AI
Tony Zhang, Founder & CEO of Tera AI: $8M Raised to Build the Future of Robotics Operating Systems
Chairman of Pryon
Igor Jablokov, Chairman of Pryon: $50+ Million Raised to Build the Future of Enterprise Knowledge Management
CEO and Co-Founder of Wispr Flow
How Wispr Flow manufactured viral moments by personally onboarding 500 users on Google Meet | Tanay Kothari ($56M Raised)
CEO and Co-Founder of Breeze ML
Harry Xu, CEO and Co-Founder of Breeze ML: $4.6 Million Raised to Create the Future of AI Governance
CEO & Co-Founder of Deep Infra
Nikola Borisov, CEO & Co-Founder of Deep Infra: $9 Million Raised to Build the Future of AI Model Hosting
CEO of NEURA Robotics
David Reger, CEO of NEURA Robotics: €185M Raised to Power the Future of Cognitive Robotics
Vice President of Seek AI
Rich Taylor, VP of Marketing at Seek AI: $10.5 Million Raised to Transform Data Analysis with Generative AI
CEO & Co-Founder of Brightwave
Mike Conover, CEO & Co-Founder of Brightwave: $6M Raised to Build the Future of AI-Powered Investment Research
CEO & Founder of Nevermined
How Nevermined coined “AI commerce” in 2023 to create category language before market adoption | Don Gossen
Stellar of Stellar
Damien Garot, CEO & Co-Founder of Stellar: $9.3M Raised to Build the Future of Reliable Internet Connectivity for Autonomous Vehicles
CEO and Co-Founder of Moderne
Jonathan Schneider, CEO & Co-Founder of Moderne: $20 Million Raised to Build the Future of Code Remediation
CEO & Co-Founder of Auquan
Chandini Jain, CEO & Co-Founder of Auquan: $8 Million Raised to Transform Financial Intelligence Through AI
Co-Founder & COO of Spot AI
Sud, Co-Founder & COO of Spot AI: $93 Million Raised to Build Video AI Agents for the Physical World
Co-Founder & CEO of VoxelSensors
Johannes Peeters, Co-Founder & CEO of VoxelSensors: $7 Million Raised to Build the Future of Spatial Computing
CEO & Co-Founder of Datavolo
Joe Witt, CEO & Co-Founder of Datavolo: $21 Million Raised to Unlock the Potential of Unstructured Data for AI
Co-Founder of Prior Labs
Sauraj Gambhir, Co-Founder of Prior Labs: $9 Million Raised to Build Foundation Models for Structured Data
CEO & Co-Founder of Titan ML
Meryem Arik, CEO and Co-Founder of TitanML: $2.8 Million Raised to Revolutionize LLM Deployment
CEO and Co-Founder of Callidus Legal AI
How Callidus scaled Google ads from 3 to 40 leads per day | Justin McCallon
SVP of Marketing of Edge Impulse
The Founder Whisperer: A Marketing Leader’s Guide to Technical CEOs
CEO & Founder of illumex
Inna Tokarev Sela, CEO & Founder of illumex: $13 Million Raised to Power the Future of Enterprise LLM Deployments
Co-Founder of Fluence Labs
Tom Trowbridge, co-founder of Fluence Labs: $9 Million Raised to Build the Future of Decentralized P2P Computing
CTO & Co-Founder of Deepset
Malte Pietsch, CTO & Co-Founder of Deepset: $45 Million Raised to Build the Future of LLMs
VP of Marketing of super{set}
Why Marketing Beats Sales Hiring at AI Startups
CEO & Co-Founder of Intenseye
Sercan Esen, CEO & Co-Founder of Intenseye: $93 Million Raised to Transform Workplace Safety Through AI-Powered Computer Vision
CEO & Co-Founder of Thoras AI
Nilo Rahmani, CEO & Co-Founder of Thoras AI: $6.5 Million Raised to Build the Future of AI-Powered Infrastructure Optimization
CEO and Co-Founder of Vayu Robotics
Anand Gopalan, CEO & Co-Founder of Vayu Robotics: $12.7 Million Raised to Build the Next Wave of Robotics Solutions
CEO and Co-Founder of Openlayer
Gabriel Bayomi, CEO and Co-Founder of Openlayer: $4.8 Million Raised to Power the Future of Machine Learning Testing
CEO and Co-Founder of MindsDB
Jorge Torres, CEO and Co-Founder of MindsDB: $50 Million Raised to Enable Developers to Integrate Machine Learning into Applications
Co-Founder and CEO of Peak
Richard Potter, Co-Founder and CEO at Peak: $118 Million Raised to Power the Future of AI-Enabled Businesses
CEO & Founder of Ask-AI
Alon Talmor, CEO & Founder of Ask-AI: $20 Million Raised to Power the Future of Enterprise AI
Co-Founder & COO of Ducky AI
James O’Brien, Co-Founder & COO of Ducky: $2.7 Million Raised to Build Internal Data Search for LLMs
CEO of Crowdbotics
Anand Kulkarni, CEO of Crowdbotics: $58 Million Raised to Power the Future of Rapid Application Development
CEO & Founder of Fiddler
Krishna Gade, CEO & Founder of Fiddler: $68 Million Raised to Build the Future of AI Observability
Founder of Cloudastructure
Rick Bentley, Founder of Cloudastructure: $57 Million Raised to Build the Future of AI Video Surveillance
Co-Founder and CEO of Krisp
Davit Baghdasaryan, Co-Founder and CEO of Krisp: $19 Million Raised to Build the Voice Productivity Category
CMO of Nexla
From Engineer to CMO — Lessons From Jayashree Rajan’s Journey
Co-Founder & CEO of Typedef
Why Typedef starts go-to-market activities during the design partner phase instead of after | Kostas Pardalis ($5.5M Raised)
CEO and Co-Founder of Phasecraft
Ashley Montanaro, CEO & Co-Founder of Phasecraft: $22 Million Raised to Build the Future of Quantum Software
CEO of Axyon AI
Daniele Grassi, CEO of Axyon AI: $5.5 Million Raised to Power the Future of Financial Markets with AI
How Personal AI scales enterprise contracts by selling to COOs and business users first | Suman Kanuganti ($16M Raised)
CEO and Co-Founder of Weaviate
Bob van Luijt, CEO and Co-Founder of Weaviate: Over $67 Million Raised to Power the Future of Vector Databases
Co-Founder and Chief Science Officer of Voxel 51
Jason Corso, Co-Founder and Chief Science Officer of Voxel 51: $15.5 Million Raised to Build the Future of Developer Tools for Machine Learning
CEO & Founder of Laurel
Ryan Alshak, CEO & Founder of Laurel: $55.7 Million Raised to Build the Future of Gen AI for Timekeeping
Field CTO & Co-Founder of CoactiveAI
William Gaviria Rojas, Field CTO & Co-Founder of CoactiveAI: $44 Million Raised to Build the Future of Multimodal AI Applications
CEO of Fireflies
Krish Ramineni, CEO of Fireflies: $19 Million Raised to Build the Future of AI Meeting Assistants
CEO and Founder of Cranium
Jonathan Dambrot, CEO and Founder at Cranium: $32 Million Raised to Power the Future of AI Security
CEO & President of Knownwell
David DeWolf, CEO & President of Knownwell: $2 Million Raised to Build the Future of Commercial Intelligence
CEO & Founder of Hamming AI
How Hamming AI accidentally created a new category by focusing on customer problems instead of category creation | Sumanyu Sharma ($3.8M Raised)
CEO & Co-Founder of Slang AI
Alex Sambvani, CEO & Co-Founder of Slang AI: $20 Million Raised to Power the Future of Voice AI for Restaurants
Co-Founder & CEO of Private AI
Patricia Thaine, Co-Founder & CEO of Private AI: Over $11 Million Raised to Help Organizations Anonymize PII to Achieve Regulatory Compliance
CEO and Co-Founder of Credal
Ravin Thambapillai, CEO and Co-Founder of Credal: $5 Million Raised to Build the Future of AI Security
CEO & Co-Founder of Lang AI
Jorge Penalva, CEO of Lang.ai: $40 Million+ Raised to Build the Customer Experience Operations Category
CEO of SEMRON
Aron Kirschen, CEO of SEMRON: $7.3M Raised to Build Ultra-Efficient 3D AI Chips
Founder & Managing Partner of Embedding VC
Funding the Future: Roger Luo, Managing Partner at Embedding VC
CEO & Co-Founder of HyperSpectral
Matt Theurer, CEO & Co-Founder of HyperSpectral: $8.5 Million Raised to Power the Future of AI-Powered Spectral Intelligence
CEO & Co-Founder of Revv
Adi Bathla, CEO & Co-Founder of Revv: $33 Million Raised to Power the Future of Auto Repair
CEO & Co-Founder of Regal AI
Alex Levin, CEO & Co-Founder of Regal AI: $82 Million Raised to Transform Customer Communication with Voice AI
CEO & Co-Founder of Threedy
Christian Stein, CEO & Co-Founder of Threedy: $11.5M Raised to Power the Future of Industrial 3D Computing Infrastructure
CEO and Co-Founder of Contextual AI
Douwe Kiela, CEO and Co-Founder of Contextual AI: $20 Million Raised to Build the Future of Enterprise Language Models