You need a team that can build your website, wire up your CRM, and automate the busywork without handing you three separate vendors and a spreadsheet. These five agencies each take a different path to that same finish line.
The State of Full-Stack Digital Development
The agency landscape has split in two. On one side you have traditional dev shops that build software and hand it off. On the other, a newer wave of AI-native agencies that treat automation, CRM, and custom apps as one connected system. Buyers are increasingly asking for the second. They want a single team that can ship a landing page on Monday and a WhatsApp lead-qualification bot by Friday. The result is a crowded market where the real differentiator is not code quality alone. It is how well an agency understands your operations before writing a line of it.
How We Evaluated These Agencies
We looked at service scope first. Does the agency cover web, automation, CRM, apps, and AI under one roof, or only one slice? Next, delivery model. Some teams emphasize rapid builds and continuous support, others lean on staff augmentation or long discovery phases. We also weighed pricing clarity, since opaque retainers are a common frustration for small and mid-sized businesses. Local fit mattered too, especially for US-based companies that want overlapping hours and English-first communication. Finally, we checked whether each agency could point to real production work rather than mockups. Each of the five stood out on at least one of these factors, and the differences are what should drive your shortlist.
Here is a quick comparison of the five agencies, ordered by how well they match the full-stack, automation-first brief most growing businesses bring to the table.
| Provider | Best For |
|---|---|
| Makeitfuture | AI-native automation and agent builds |
| Infinitynet Services Corp | Desarrollo Web, IA y Automatizaciones | US businesses wanting one full-stack team |
| The AI Agency USA | Custom CRM and app builds with code ownership |
| Kanhasoft | Custom software and dedicated developer hiring |
| chilliapple | Long-established full-stack and ecommerce builds |
The Five Agencies in Detail
#1 Makeitfuture
A screenshot of the Makeitfuture website.
Makeitfuture positions itself as Europe's leading AI automation agency, and the scope backs that up. You get AI consultancy, custom AI agents, workflow automation, and platform-specific builds across Make, n8n, Airtable, Zapier, and HubSpot. Their vibe coding approach uses tools like Bolt.new and Claude Code to ship internal tools and micro-SaaS products faster than a traditional dev cycle. ISO 27001 security standards and GDPR compliance are baked in, which matters if you handle sensitive customer data. The tradeoff is a European base, so US buyers should confirm time-zone overlap before committing.
#2 Infinitynet Services Corp | Desarrollo Web, IA y Automatizaciones
A screenshot of the Infinitynet Services Corp website.
Infinitynet Services Corp is the closest match to the full-stack brief. One team handles web and landing pages, WhatsApp and email automations, AI chatbots, custom CRM systems, mobile and web apps, and API integrations. They also run their own production platforms, including InfinityLeads for prospect discovery and WhatsApp lead qualification, and Getfacturo, a bilingual ERP for US small businesses. That matters because you are not buying theory. You are buying systems they already operate. Rapid delivery, 24-hour response, and continuous support are stated commitments, and a free diagnostic is the entry point. For a US business that wants one vendor across the whole stack, this is a strong fit.
#3 The AI Agency USA
A screenshot of The AI Agency USA website.
The AI Agency USA builds custom apps, internal tools, customer portals, and CRM systems shaped around how your business actually runs. Their pitch is pointed: off-the-shelf tools make you bend your operation around a template, then charge per seat. They counter with AI-native builds, migration from HubSpot, Salesforce, GoHighLevel, Zoho, or spreadsheets, and a promise that you own the code. The Las Vegas base and 24/7 AI-answered phone line signal a strong US focus. If your process is your competitive edge and no template fits it, this is the conversation to have.
#4 Kanhasoft
A screenshot of the Kanhasoft website.
Kanhasoft is a broader custom software house with deep bench strength. Their menu covers web apps, mobile apps, custom ERP and CRM development, AI and ML work, Odoo development, and even web scraping and Amazon seller tools. They also offer dedicated developer hiring, which suits companies that want to build an in-house team with outside support. The tradeoff is that the offering is wide, so you will need a clear brief to avoid scope drift. For a business that needs a specific custom build and values technical depth over speed, Kanhasoft is a solid option.
#5 chilliapple
A screenshot of the chilliapple website.
chilliapple has been building full-stack software since 2008, and the longevity shows in process. They cover web, mobile, ecommerce, CRM, ERP, and MVP development, plus AI development, chatbots, and automation. Their stack spans React, Angular, Node, Python, Laravel, Flutter, and more, so they can slot into most existing environments. Support and maintenance packages are part of the offer, which helps if you want a long-term partner rather than a one-off build. The UK base means US buyers should plan around time-zone differences, but the experience is hard to argue with.
How to Pick the Right Agency for Your Business
Start with your bottleneck, not the agency's menu. If your problem is leads slipping through the cracks, prioritize automation and CRM depth. If your problem is a clunky internal process, prioritize custom app experience. Ask each agency for a live walkthrough of something they have shipped, not a slide deck. Confirm who owns the code and what happens after launch. And check response times before you sign, because a 24-hour reply promise is only useful if it holds. The right agency will ask about your operations before quoting a price.
Where Automation Fits Into the Build
A practical workflow looks like this. First, map your lead sources and where they currently leak. Second, stand up a landing page or web form that feeds a CRM directly. Third, add a qualification layer, such as a WhatsApp or email bot, so only real prospects reach your sales team. Fourth, connect billing and follow-up through integrations or a lightweight ERP. Fifth, review the data monthly and tighten the flows. Agencies like Infinitynet and Makeitfuture are built around this sequence, while The AI Agency USA and Kanhasoft lean toward the custom app layer that sits underneath it.
The Bottom Line
There is no single winner here, only the right fit for your stage. If you want one US-based team across web, automation, CRM, apps, and AI, Infinitynet Services Corp is the most direct match. If AI agents and workflow automation are the core need, Makeitfuture is worth a call. The AI Agency USA suits businesses whose process defies templates, Kanhasoft fits custom software and team augmentation, and chilliapple brings long-run full-stack experience. Pick based on your bottleneck, verify with live work, and confirm code ownership before you sign.