Custom Software Development in New Hampshire
Web Apps. API Integrations. AI-Powered Tools.
We build the software your business actually needs — not templates, not page builders, not off-the-shelf tools that almost work. Custom code, built around how you operate.
A 30 minute call with founder Garrett Handley. We review your site, your Google profiles and who outranks you in each market, then send a proposal with the first three fixes we would make, in writing. Yours to keep, whether you hire us or not.
More than websites. Real software.
Most agencies stop at marketing sites. We build the tools your business runs on.
Web Applications
Full-stack apps that go far beyond a marketing site.
- Customer portals & dashboards
- Internal business tools
- SaaS platforms
- Admin panels & CMS solutions
- Booking & scheduling systems
API Integrations & Automation
Connecting your tools so they actually talk to each other.
- CRM ↔ website data sync
- Payment processing pipelines
- Third-party API integrations
- Automated reporting & alerts
- Webhook-driven workflows
AI-Powered Tools
Custom AI that works on your data, for your business.
- AI chatbots & assistants
- Automated outreach agents
- Document processing & extraction
- Intelligent lead scoring
- Custom LLM integrations
Not just a web agency.
There's a gap between what most agencies build and what growing businesses actually need.
Typical agency
Spearlance
The right tool for the job.
We don't lock you into a single platform. We pick the best tools for your specific problem and build something that lasts.
Frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
Backend
- Node.js
- Python
- Supabase
- REST & GraphQL APIs
Data
- PostgreSQL
- Redis
- Drizzle ORM
- Real-time Subscriptions
AI
- Claude / Anthropic
- OpenAI
- Custom Agents
- LLM Orchestration
How we build.
No surprises. No big reveal at the end. You see working software early and often.
Discovery
We learn your business, your users, and the problem you're solving. No code yet — just the right questions.
Architecture
We map the data model, API surface, and user flows. You see the blueprint before we write a line of code.
Build
Iterative development with weekly check-ins. You see working software early and often, not a big reveal at the end.
Launch
Deployment to production infrastructure with monitoring, error tracking, and performance baselines from day one.
Maintain
Ongoing support, updates, and improvements. We don't disappear after launch — your software keeps getting better.
We eat our own dog food.
The AI agents that manage Spearlance's own marketing? We built them. The dashboard you'd use to manage your project? We built that too. We don't just talk about custom development — we run our entire business on it.
AI Agent Team
A team of AI agents that prospect leads, research companies, write personalized outreach, and manage follow-ups — all running autonomously. The same architecture we build for clients.
Business Dashboard
A full admin panel with SEO analytics, content management, lead tracking, keyword intelligence, and performance monitoring. Real-time data from Google Analytics, Search Console, Bing, and Clarity — all in one place.
You probably need custom development if...
You've outgrown your website
Your business needs something your current site can't do — a client portal, a booking engine, a dashboard. You need custom software, not another WordPress plugin.
You're scaling a process
You have a manual workflow that's eating hours every week — data entry, report generation, lead follow-up. You need automation that's built around how your business actually works.
You want AI but don't know where to start
You've seen what AI can do but don't have the technical team to build it. You need a partner who can turn "we should use AI for this" into a working tool.
Common questions
Find out which locations are leaking leads
In 30 minutes we look at your site, your Google profiles and who outranks you in each market. You leave with the three fixes we would make first, in writing. No pitch deck, no obligation.