Originally published on LinkedIn on April 2, 2025.

tl;dr

• Mind-blowing AI Voice Agent demo
• LLM-powered AI Voice Agents now generating revenue
• Secured customers across insurance, mortgage, legal, B2B, and education
• Seeking Seed funding after initial traction
• Demos available at LeadsCon Vegas (April 7-8) or via Zoom

I. The 4/2 Tradition Continues

Many people who know me know that April 2nd (i.e., 4/2) is a special day for me. I chopped off my first ponytail on 4/2 (2012) and then a pandemic ponytail 10 years later on 4/2 (2022). I incorporated my previous startup business on 4/2 (2015), and I’ve provided Symphony42 updates here on LinkedIn on 4/2/2022, 4/2/2023, and 4/2/2024. Today marks our FOURTH annual update, and what a wild and crazy trip it’s been.

Upon reflection, it’s incredible to see how far we’ve come since that initial announcement in 2022. What began as a bold vision to harness the power of Conversational AI for Lead Gen has evolved into a sophisticated platform that’s redefining the very essence of how businesses connect with consumers.

We’ve dreamed. We’ve imagined. We’ve pushed boundaries, challenged conventions, and dared to build a future where LLMs are not just a new tech tool, but a literal partner in crafting “Delightful Dance”™ personalized consumer experiences at scale using autonomous and persuasive AI Agents.

As we stand at the threshold of a fantastic new era in AI-driven consumer engagement, I’m excited to share with you the latest developments in the Symphony42 startup story. We’re at a pivotal moment in the AI Agent revolution – a time when production-ready AI agents are transforming from science-fiction into science-fact – transforming into everyday business reality. The speed of development and advancement has been breathtaking – I have never seen anything like it in 30-years as an Internet entrepreneur – and Symphony42 is right at the center of it all.

So, buckle in and join me on this thrilling ride as we explore how Symphony42 is orchestrating a revolution in B2C Customer Acquisition, one AI-powered “Delightful Dance”™ interaction at a time :-)

II. The Fundraising Journey: Proving the Early Investors RIGHT :-)

One of the things I’m most proud of is the incredible roster of Pre-Seed investors who believed in Symphony42 before we had a single dollar of revenue. A very special shout-out and thank you to: Robert Glazer, Greg Cangialosi, John Akkara, Pete Kim, Ross Shanken, Sam Melamed, Sean Hanlon, Stein Kretsinger, Sumeet Goel, Joeri Weyenberg, David Galper, Mark Drever, Steven Freidkin, Jeffrey Rosen, Jason Schneider, Omar Shallah, Grant Mowat, Jalmar Dijkstra, Mick Dubea, Jordan Beeman, Sally Hurley, Doug Lebda, Sid Banerjee, and Jim Rowan.

I’m equally grateful to our SAFE investors who stepped in to bridge us to a VC Seed round, including: Jerry Neumann, Sam Melamed (2nd investment), Matt Keiser, Charles McCusker, Charles Bryan, John Giordano, Ajay Batish, and Jay Weintraub.

As earliest-stage investors, their faith in our vision during a critical growth phase has been instrumental in helping us reach our recent milestones.

Our Board continues to provide invaluable guidance and support. In particular, I want to recognize Dave Blundin for his unparalleled AI expertise and strategic vision, Ross Shanken for his deep industry knowledge and connections, and Stein Kretsinger for his sage advice on scaling and Customer Acquisition strategies. Stay tuned for an exciting announcement about a new Board member that will be joining soon :-)

Since 2022, our Pre-Seed and SAFE investors saw Symphony42’s potential early on. Now, in 2025, as we’ve hit milestone after milestone, we’ve been methodically validating their belief and turning their early faith into demonstrable results.

In 2024, we hit the Seed round fundraising trail, meeting with dozens of VC funds on both coasts to secure our Seed round. The feedback was directionally consistent and music to our ears:

The team and Board? Loved ✓
Agentic AI for Persuasion and Customer Acquisition? “A revolution we want to back” ✓
Capital-efficient strategy and champion/challenger methodology? Two big thumbs up ✓

But here’s the candid part: despite the enthusiasm, we didn’t land a term sheet. The consensus? “Too early — come back when you have more traction.” Fair enough. We did not previously hear this same feedback from the Pre-Seed and SAFE investors, but rather than being discouraged, we took the feedback as a challenge to prove what we already knew. Symphony42 is building the future of AI Customer Acquisition, and we just needed to make that future visible to others – we embraced the challenge.

So, we rolled up our sleeves and got to work. While continuing our conversations with VCs, we focused relentlessly on execution and validation. We launched our production-ready AI Voice Agent, transforming it from a prototype to a market-ready solution that consistently delights and amazes everyone who experiences it. We signed key customers across multiple verticals — from insurance and mortgage to legal and education – another bullet point checked: MULTI-VERTICAL aspect of Symphony42 AI Customer Acquisition Platform: Validated ✓

The most significant validation came in December 2024, when we achieved a pivotal milestone — our first revenue from AI Voice Agents. And not just from one offering, but from BOTH our Bundled offering AND our Platform offering. This wasn’t just symbolic, it was proof that there is immediate and growing demand for AI Agents for Customer Acquisition.

We’ve been sharing these achievements with the VCs we met last year, demonstrating our AI Voice Agent in live demos and detailing our growing customer roster. The response? Minds blown :-O Every meeting ends with excitement and requests for next steps. While we’re still in the process of securing that perfect Seed round partner, the conversations have completely transformed. We’re no longer defending the “too early” objection — we’re fielding questions about scaling and discussing potential AI talent recruiting strategies :-)

The right partner is out there, and we’re confident they’ll join us soon. In the meantime, we continue to build, grow, and validate — because ultimately, the strongest position in any fundraising journey is one backed by undeniable traction and results.

III. The “Mind-Blowing” AI Voice Agent Comes to Life

While we’ve been navigating the fundraising journey, our team has been heads-down, building something extraordinary. Our AI Voice Agent is no longer a prototype or a demo — it’s live, persuasive, and transforming Customer Acquisition in real-world deployments. When I say “mind-blowing,” I’m not exaggerating — we’ve literally seen jaws drop during demos with industry veterans who’ve “seen it all.”

What makes our AI Voice Agent so exceptional? First, the natural conversation flow is unlike anything in the market. We’ve effectively eliminated the robotic latency issues that plague many voice AI solutions. Our agent responds with human-like timing and conversational rhythm — no awkward pauses or interruptions.

Second, we’ve integrated emotional intelligence technology, enabling our agent to detect subtle emotional cues and adapt its tone and approach in real-time. The result? Conversations that feel genuinely empathetic and responsive, not scripted.

This represents a significant evolution from where we started. In 2022, we launched with text-based interactions only, leveraging the ChatGPT API for our initial SMS flows. In 2023, we expanded our text capabilities and began experimenting with voice. By 2024, we had working voice prototypes. Today, we have a fully operational, multi-modal AI Customer Acquisition platform that handles text, voice, and video/avatar interactions with unprecedented effectiveness.

We’ve also made our first foray into Video/Avatar AI with B2B custom food catering service pairing local chefs with office workers as our pioneering customer. While the Video/Avatar capability shows tremendous promise, we’re realistic about its current limitations. The voice-based offering is where we’re seeing the most immediate impact and traction, which is why we’re doubling down on scaling our voice deployments across verticals.

But we’re not stopping there. Our Champion/Challenger methodology continuously tests different LLM models (currently GPT-4o as Champion with Claude 3.7 Sonnet as Challenger) to ensure optimal performance across use cases. This is more than just A/B testing — it’s a systematic approach to identifying which models excel at different types of persuasive interactions, creating a feedback loop that continuously improves performance.

Perhaps most exciting, the Persuasion Genome Project is beginning to yield fascinating insights. Every conversation our AI Agents have with consumers generates valuable Multi-modal Behavioral Biometric Feedback Data (MMBBFD), which feeds into our proprietary dataset. This isn’t just any data — it’s real-world interactions between AI Agents and consumers with clear outcome measurements (did the conversation convert or not?). Unlike synthetically generated conversations between LLMs or legacy human-to-human sales recordings, this data provides the ground truth for what actually works in persuasive AI interactions.

The implications are enormous. We’re not just building AI agents — we’re creating a comprehensive understanding of persuasion itself, one conversation at a time. And with each interaction, our platform gets smarter, more effective, and more valuable to our customers and partners.

Our AI Voice Agent isn’t just MIND-BLOWING—it’s brain-rearranging :-O The only thing developing faster than our technology is the speed at which demos convert to contracts :-)

IV. Traction: The Market Says “Yes!”

December 2024 was a watershed moment for Symphony42 – the month we definitively proved our model works with actual revenue flowing through both our Bundled and Platform offerings. This wasn’t just symbolic progress; it was market validation that businesses are ready to embrace AI Voice Agents for customer acquisition at scale.

Our Platform Offering has secured impressive customer wins across diverse verticals:

Legal Marketing and Customer Acquisition Platform: Our first Platform revenue :-) This company is implementing a phased “Crawl, Walk, Run” approach for Motor Vehicle Accident cases, starting with state qualification and advancing toward full-funnel acquisition. Their move from qualification to persuasion demonstrates the expandable nature of our platform.

Large Publicly Traded Customer Acquisition Business: A brilliant AI Voice Agent use case – assisting consumers in comparing and choosing among multiple competing offers.

Automated HELOC Lending Platform: Adding net new capabilities. Rather than replacing humans, they’re using our AI Agents to unlock opportunities they couldn’t pursue with a human-centric model. Calls are expected to begin flowing in April, transforming inquiring consumers into funded loans.

Non-Standard Auto Insurance Carrier: A prime example of “replacing humans” use case – they’re transitioning from near shore call center agents and US-based licensed agents to our AI Voice Agents, dramatically reducing costs while improving conversion rates.

EDU Lead Gen Business: Using our platform to capture conversational EDU data in a fully TCPA-compliant way – solving both the compliance and efficiency challenges that have plagued this vertical.

B2B Food Services Marketplace: Our first Video/Avatar deployment :-) This venture-backed pioneering client demonstrates our platform’s versatility beyond B2C applications.

Meanwhile, our Bundled Offering is thriving with one of the leading Customer Acquisition businesses buying auto insurance calls in 35 states, with multiple traffic supply partners providing traffic to our AI Agents through paid media and revenue-share arrangements. The beauty of this model is that it’s infinitely scalable as we add more supply and demand partners to the ecosystem.

But what’s truly exciting is that our sales funnel literally spilleth over. We have dozens of high-quality sales prospects advancing through our pipeline – from Prototype Demo stage (a large Insurance Lead Seller, a B2B Lending Platform, and multiple Pay-per-Call Lead Generators) to High Priority status, the momentum is undeniable. If Product Market Fit can ever be measured by a sales funnel alone, this is IT :-)

What’s particularly fascinating is how our traction validates the “Dual AI Opportunity” – we’re seeing success with both “replacing humans” (lower costs, higher consistency) AND “adding net new capabilities” (tasks humans couldn’t perform at scale). This isn’t just about cost-cutting; it’s about expanding what’s possible in Customer Acquisition entirely. These complementary opportunities effectively double our TAM, as different organizations pursue AI adoption through different strategic lenses.

The market has spoken, and the verdict is clear: Symphony42’s AI Voice Agents aren’t just the future – they’re delivering measurable value today :-)

V. The Core Team: “It’s All About the People”

Personally, I believe: “It’s all about the people”

It’s a philosophy that I live by. The passion, expertise, and relentless drive that each team member – both the Founding Team and members of the Symphony42 Board – brings to the table is what fuels our success. Despite the challenges of building before raising Seed funding from VCs, we’ve assembled a world-class team of entrepreneurs and AI experts who share our vision for the future of Customer Acquisition.

What’s especially impressive is how this core team has accomplished so much while being incredibly capital-efficient. We’ve built a production-ready platform, signed multiple enterprise customers, and generated our first revenue, all before closing our Seed round. This level of execution speaks volumes about the team’s capabilities and commitment.

I am grateful beyond words to have these extraordinary individuals alongside me on this journey. Their belief in Symphony42’s vision, even during the challenging early days, has been the foundation upon which we’ve built our success. As we continue to grow and evolve, I know that maintaining our people-first philosophy will remain our greatest competitive advantage.

VI. Ecosystem & Collaboration: Our Force Multipliers

At Symphony42, we’ve always believed that the key to truly revolutionizing an industry is not just to build a great product and company, but also to foster a thriving ecosystem around them. From day one, we’ve been committed to collaborating with a wide range of partners, advisors, and stakeholders who share our vision for the future of AI-powered Customer Acquisition.

The technology integration partners powering our platform deserve special recognition as well. OpenAI and Anthropic are just two of the foundational LLMs that drive our Champion/Challenger methodology, with GPT-4o and Claude 3.7 Sonnet delivering exceptional performance, but Google Gemini 2.5 Pro, xAI Grok 3, and open source models like Llama and DeepSeek are giving chase as future Challengers. Ringba continues to be our trusted partner for call tracking, recording, and delivery, while Twilio powers our communication infrastructure on the supply side of the platform.

Our strategic integration with Hume.ai will be transformative, enabling our AI Voice Agents to detect and respond to emotional cues in real-time.

Beyond traditional partnerships, we’ve been pioneering innovative ways to connect with our ecosystem. In October 2024, I experimented with Google’s NotebookLM to create personalized AI-generated podcasts for everyone involved with Symphony42 – from founding team members to investors and advisors. The response was tremendous, and we’ve continued generating dozens of these personalized podcasts each month since then. This creative approach to stakeholder engagement exemplifies our commitment to leveraging cutting-edge AI not just in our core product, but in how we build and nurture relationships. It’s yet another example of how we’re living our AI-first philosophy in everything we do.

One of the ways we’re driving collaboration is through our active participation in industry events and conferences. In January, I attended Lead Generation World where I connected with numerous potential partners, customers, and prospects. Many of those conversations have already translated into productive relationships and pipeline opportunities.

We’re also planning on attending Contact.io in August.

The ecosystem we’ve built around Symphony42 is more than just a support network – it’s a force multiplier that accelerates our growth and amplifies our impact. By bringing together the best minds, technologies, and resources in the industry, we’re creating something far greater than the sum of its parts. And for that, I couldn’t be more grateful.

VII. The AI Voice Agent Demo: Experience the Revolution

I’ve spent a lot of this article telling you about our AI Voice Agent, but the truth is – no description can do it justice. You simply have to experience it yourself. It’s like trying to explain color to someone who’s never seen it – impossible until you witness it firsthand.

That’s why I’m extending a personal invitation to experience our AI Voice Agent in action. See (or rather, hear) for yourself why industry veterans are calling it “MIND-BLOWING” and why our customers are reporting 5-10X performance improvements over human agents.

Option 1: Meet Me at LeadsCon Las Vegas (April 7-8, 2025)
I’ll be conducting live, in-person demos throughout the event. This is your opportunity to not only experience the AI Voice Agent in real-time but also to discuss specific applications for your business directly with me. Whether you’re in insurance, mortgage, legal, education, or any other consumer-facing industry, I’d be thrilled to show you exactly how our technology can transform your customer acquisition efforts. Find me at the event or email me at sean@symphony42.com to schedule a specific time.

Option 2: Private Zoom Demo
Can’t make it to LeadsCon? No problem. I’m setting aside dedicated time for private Zoom demos in April and May. These sessions typically run 30 minutes and include:

• A live demonstration of the AI Voice Agent in action
• Discussion of your specific use case and potential ROI
• Q&A about implementation, timelines, and pricing

To schedule your private demo, simply:

• Email me directly at sean@symphony42.com
• Text me at 410-916-1232
• Or call that same number and leave me a message (yes, our AI will take it but I will respond personally :-)

I cannot emphasize this enough: you won’t believe what this technology can do until you experience it for yourself. Every single person who’s received a demo has had the same reaction – initial skepticism followed by genuine amazement. The conversations are so natural, so persuasive, and so effective that many people refuse to believe it’s not a human on the other end.

Don’t miss your chance to see the future of Customer Acquisition today. Reach out now to schedule your demo – whether at LeadsCon or via Zoom – and prepare to have your expectations completely redefined and your MIND BLOWN :-O

VIII. Vision & Defensibility: Building the Ultimate Sales Machine

As we look ahead, our vision remains crystal clear: Symphony42 is building the ULTIMATE SALES MACHINE that can sell anything to anyone at any time 10X better than the best live human can. We’re not just chasing a small opportunity – we’re targeting a $1+ Trillion market transformation.

The reality is that in the next 5 years or so, 100% of live human call center agents will be replaced with AI Agents, and >50% of live human consumer sales reps will be replaced with AI Agents. Simple math indicates this creates a $1 Trillion change to the surface area of the Customer Acquisition space. And we know that we’ll face not just other AI Agent startups, but also Tech Titans in capturing a disproportionate amount of this $1 Trillion opportunity.

Our aspiration is to become the “Twilio for AI Sales Agents” – a platform that powers persuasive AI-driven sales interactions across every industry, vertical, and interaction modality. Just as Twilio revolutionized communications with its API-driven approach, Symphony42 will provide the foundational layer for AI Agent-powered Customer Acquisition worldwide.

At the heart of this vision is what we call a “Delightful Dance”™ between consumers and AI – a seamless, personalized experience between consumer and AI that feels less like a traditional sales interaction and more like a genuine, helpful conversation. This is the future of consumer engagement. By combining the efficiency and scalability of AI with the empathy and personalization of human conversation, we’re creating a new paradigm that benefits both businesses and consumers alike.

But a grand vision alone isn’t enough. What makes Symphony42 truly defensible is our unique approach to building and strengthening our moat:

First and foremost, we’re obsessed with accumulating a massive proprietary corpus of training data from our real-world sales conversations between Symphony42 AI Agents and consumers. This isn’t just any data – it includes the final disposition (did the conversation convert into a sale, i.e., revenue-generating event, or not?). We believe unique/proprietary training data is the real arms race in AI, and our growing corpus will become the most valuable asset in the company by the time we go public in five years.

This creates a beautiful flywheel effect: More conversations → Better data → Higher conversion rates → More customers → Even more conversations. Each interaction makes our platform more effective, creating a virtuous cycle of recursive self-improvement that’s incredibly difficult for competitors to replicate.

We’re using the $10 Billion Lead Gen ecosystem as our “AI Trojan Horse” into the bigger $1+ Trillion full-funnel Customer Acquisition opportunity. This strategic entry point is perfect because:

• It’s a market our team knows better than almost anyone
• It’s not a primary target for VC-funded competitors (who historically focus on B2B)
• Every player in the ecosystem is desperately seeking improved ROAS and lower CAC and will pay handsomely for measurable lift.

Speaking of metrics, we’re leading the shift from ROAS (Return on Ad Spend) to ROAI (Return on AI Investment) as the north-star metric for evaluating technology effectiveness. Just as ROAS became the benchmark for online advertising, ROAI will be the key measure for AI investments. By focusing on measurable, bottom-line impact, we help businesses understand the true value of AI and make smarter, more strategic decisions about resource allocation.

What excites me most is that we’re still in the early innings of this revolution. The technology improves exponentially every quarter while costs continue to decline. Meanwhile, media and traffic costs are rising due to real scarcity. Thus, using AI technology to increase the effectiveness and efficiency of customer acquisition (higher ROAI, lower CAC) is an evergreen business value proposition.

We’re not just building another AI startup – we’re orchestrating a fundamental transformation in how businesses connect with consumers. And we’re just getting started :-)

IX. Conclusion: Join the Symphony42 AI Orchestra

To our customers, partners, and investors: thank you for your trust, your support, and your partnership on this exciting journey. Your success is our success, and we’re honored to be a part of the collective growth story we’re writing together.

To the Symphony42 team and community, thank you for your hard work, your creativity, and your unwavering dedication to the vision of AI Customer Acquisition. You’re the heart and soul of Symphony42, and I’m incredibly proud to work alongside you every day.

As we move forward, our invitation to join the Symphony42 AI Orchestra takes different forms depending on who you are:

AI Rock Stars – Join the Founding Team and help us build the World’s Leading AI Customer Acquisition Platform. Tech folks and business folks, come be part of a revolution that’s redefining an entire industry.

Angel Investors – Join the Symphony42 SAFE and position yourself for outsized returns as we continue our rapid growth trajectory.

VC Investors – Join Symphony42 by leading our Seed round. We’ve proven the model works; now help us scale it to its full potential.

Potential Customers – Join the Symphony42 family of early-adopters and instantly become a market leader in AI Customer Acquisition. Experience the 5-10X performance improvements that are leaving your competitors behind.

Potential Partners – Join the Symphony42 family of integration partners and help grow the ecosystem of AI Customer Acquisition. Together, we can create even more value for businesses and consumers alike.

But whatever your role might be, I encourage you to take that first crucial step: Experience our AI Voice Agent for yourself. Whether at LeadsCon in Vegas next week or via a private Zoom demo, seeing (and hearing) is believing. This isn’t just another incremental improvement in Customer Acquisition – it’s a paradigm shift that you need to experience firsthand.

The Symphony42 AI Orchestra is playing. The performance is underway. And the audience – the market – is responding with a standing ovation.

Come join us. The music has never sounded better :-)

— Sean Fenlon, Founder/CEO, Symphony42