StackOptimise
United Kingdom
Expertise
- AI Outbound
- Signal-Based Outreach
- TAM Sourcing / Prospecting
- Data Enrichment & Waterfall
- Enrichment
- Cold Email Systems & Deliverability
- Multi-Channel Outreach
- Intent Data & Buying Signals
- CRM Enrichment
- GTM Engineering & Infrastructure
- AI Personalization & Copywriting
ICPs
- Growth stage startups
- Mid-Market companies
- Enterprise
Target Industries
- Marketing Agencies
- B2B Software / SaaS
- Training & Recruitment
- Real Estate
- Consulting
- Recruiters & Staffing Firms
StackOptimise is a leading GTM (Go-To-Market) Engineering Agency founded in October 2024 by brothers Felix and Penn Frank, who bring a combined 15+ years of frontline B2B sales experience. Before launching StackOptimise, they climbed the ranks from SDRs to AEs to Heads of Sales at publicly traded companies like Deliveroo and Confluent, and VC-backed scale-ups like Monzo, Birdie, Oxwash, and Stream Native.
StackOptimise builds tech-powered outbound systems that leverage signal-based outreach to deliver personalized campaigns at scale and book more meetings with quality leads. They send 500,000+ cold messages monthly across email, LinkedIn, and WhatsApp, and have driven £10M+ in pipeline for their clients.
What makes them unique: StackOptimise is the only agency in the world triple-certified by Clay, Smartlead, and GetSales, one of only 9 agencies globally to hold both Clay and Smartlead certifications. They’ve tested 800+ sales tools and built a $150K enterprise tech stack that clients get full access to.
The team has grown to include GTM Engineers and now supports 40+ B2B companies while maintaining a community of 50,000+ sales professionals through their newsletter and educational content.
Penn Frank
Co-Founder @ StackOptimise​
“AI Ark has accelerated our high-volume lead exports, delivering deeper enrichment at scale without sacrificing data quality. Pre-verified emails reduce bounce rates and eliminate a separate validation step, lowering operational overhead. Fast, reliable platform with a highly responsive, innovative team.”
Case Studies
Lyra Studios
StackOptimise helped Lyra Studios generate pipeline rapidly by offering custom experiential marketing concepts, combining unique value propositions with intent-driven outreach for fast results.
BePro
StackOptimise helped BePro transform their sales funnel using a government funding initiative as a hook with signal-based outreach and hyper-personalized messaging, generating 80-120 qualified leads monthly.
Hummingbird
StackOptimise partnered with Hummingbird to build a fully automated outbound system using buying signals and personalized outreach, delivering consistent high-quality leads from their exact ICP.
