CRM & marketing integrations
Push leads, contacts and activity into Salesforce, HubSpot or Zoho, and sync updates back, so sales always has current data.
App Backend & API · Third-Party Integrations · AI-First · Results-Driven
Third-Party IntegrationsConnect Your Backend to the Tools You Rely On
Short answer: Third-party integrations are the backend connections that let your app talk to outside services: CRMs like Salesforce and HubSpot, messaging like Twilio and SendGrid, maps, accounting tools, and payment or logistics providers. Done well, data flows automatically between systems so nothing is re-keyed by hand and both sides stay in sync; done poorly, integrations break silently, duplicate records, or lose data when an external API changes. Zen in Tech builds integrations in-house against each provider's API, with webhooks, retries and monitoring so failures surface instead of hiding. Judge the work on reliable data sync, graceful handling of API errors and rate limits, and how cleanly it copes when a third-party service changes.
Making your app part of a bigger toolset
No app is an island. The data in your product usually needs to reach the other tools a business runs on: leads into a CRM, transactions into accounting, notifications through email or SMS, addresses onto a map. Third-party integration is the backend work of connecting to those services through their APIs so information moves automatically, instead of someone copying it between systems by hand and making mistakes.
The challenge is that you do not control the other side. External APIs enforce rate limits, change their formats, go down, and return errors, so a solid integration is defensive by design: it retries transient failures, respects limits, verifies webhook signatures, and keeps data consistent when one system is briefly unreachable. Many integrations are two-way, which means handling sync conflicts and avoiding infinite update loops. Watch for integrations that assume the other service is always up, and ones with no logging, so when they break, nobody notices until data has been missing for days.
Because we build integrations as part of your backend, external data lands in the same data model and permission system as everything else, cleanly mapped rather than dumped in. We add webhooks, retries, idempotency and monitoring from the start, so a hiccup at the other end is handled and visible, and your systems stay in agreement instead of quietly drifting apart.
What we cover
What our third-party integration work covers
Payment & accounting connections
Connect Stripe, QuickBooks or Xero so transactions and invoices flow into your books without manual entry.
Maps, geolocation & logistics
Integrate Google Maps Platform or Mapbox for geocoding, routing and location features, plus shipping and logistics APIs.
Messaging (email, SMS & chat)
Send transactional email and SMS through SendGrid, Postmark or Twilio, and connect chat tools like Slack.
Webhooks & event sync
Two-way sync with signature-verified webhooks and idempotency, so both systems stay current without duplicate or lost records.
API middleware & orchestration
A clean integration layer that maps and routes data between services, with retries and rate-limit handling built in.
Services
Integration services we deliver
From a single API connection to a whole integration layer, here is how we connect your backend to the services you depend on.
New integration build
Connect your app to any third-party API, from a niche industry tool to a major platform, cleanly mapped into your data.
CRM integration
Two-way sync with Salesforce, HubSpot or Zoho so leads, contacts and deals stay consistent between your app and your CRM.
Data sync between systems
Keep records in agreement across multiple tools, with conflict handling so no side silently overwrites the other.
Build or replace an integration layer
Design a maintainable middleware layer, or rebuild a brittle set of one-off scripts into something reliable.
Webhook & event pipeline
Receive and process events from external services reliably, with verification, retries and dead-letter handling.
Integration monitoring & maintenance
Add logging, alerting and ongoing upkeep so integrations keep working when a third-party API changes or has an outage.
Tools & platforms
The integration stack we work with
The exact toolset depends on your goals — these are the platforms we use most, and we work with whatever your team already relies on.
Payments & accounting
Maps & location
Google Maps PlatformMapbox
Chosen per project — not a fixed menu. Have a preferred tool or platform? We’ll work with it.
Built to last
Secure, Accessible & Built to Last
We build on modern, well-supported frameworks with security and accessibility baked in — dependency hygiene, input validation, HTTPS and WCAG-minded UI — so your product is safe and usable from day one.
You own all the code and assets. Everything ships with documentation and a clean handover, so your team (or ours) can maintain and extend it without lock-in.
Who we work with
Industries We Build For
20+ years across sectors — in Houston and internationally.
Transparent pricing
Estimate your project in seconds
Pick what you’re building for an indicative range, then request an exact quote. No email wall.
Simple prices for typical tasks
- App APIfrom $10k
- Backend + authfrom $18k
- Realtime / scalefrom $25k
- Care planfrom $1k/mo
Proof
700+ projects, 20+ years
See the products and growth work we’ve shipped across industries — and request a case study relevant to yours.
How we work
Fixed scope. Sprints. Working software.
- 01
Scope & fixed estimate
A short discovery call turns your idea into a clear spec and a firm range — free.
- 02
Design & architecture
UX, data model and stack chosen for your scale, not ours.
- 03
Build in sprints
Working software every 1–2 weeks — you see progress, not promises.
- 04
Launch & scale
We ship, measure and keep improving with care plans.
FAQ
Third-party integrations: frequently asked questions
How much does a third-party integration cost?
It depends on the service and complexity. A single, well-documented API connection is often a few thousand dollars, while a two-way sync across several systems with conflict handling costs more. Integration work is usually scoped inside a backend build, which typically starts around $10,000. Any fees charged by the third-party service are separate. We confirm the exact figure on a free call.
What is a third-party integration?
A third-party integration is a backend connection between your app and an outside service, built against that service's API, so data moves between them automatically. Examples include sending new sign-ups to your CRM, pushing invoices into accounting software, or sending SMS through Twilio. The point is to remove manual copying and keep your systems in sync.
How long does an integration take to build?
A straightforward one-way connection to a well-documented API often takes a few days to a week. A two-way sync with conflict handling, or an integration with a poorly documented or legacy service, takes longer. We give a firm timeline once we have reviewed the specific API and what data needs to flow in which direction.
What happens when a third-party API changes or goes down?
We build integrations defensively: retries for transient failures, respect for rate limits, signature-verified webhooks, and logging plus alerting so a problem surfaces immediately instead of silently losing data. When a provider changes its API, monitoring flags the break early, and because the integration lives in a clean layer, we can update it in one place rather than hunting through scattered scripts.
Do you build integrations for businesses outside Houston?
Yes. We are based in Houston but build integrations for clients across Texas, the USA, and internationally. The work is delivered remotely, and we connect to whichever regional or global services your business and customers rely on.
Do you help Houston businesses connect their apps to other tools?
Absolutely, it is our home market. Our office is at 9800 Richmond Ave in the Westchase / Energy Corridor area, and we can meet in person to map out how your app should connect to your CRM, accounting, messaging and other tools. Everything is built in-house by our own specialists.
Can you connect to a tool that isn't on your list?
Almost always, yes. As long as the service offers an API or webhooks, we can integrate with it, including niche or industry-specific tools. If a service has no public API, we look at alternatives like file-based exchange or supported automation platforms. Tell us what you use on a free call and we'll confirm what's possible.
Connect your app to everything it needs
From CRMs to maps to messaging, we'll build reliable integrations that keep your systems in sync. Get a free estimate from our in-house Houston team.
Knowledge hub
From our knowledge hub
All articles →AI Automation
How to Choose an AI Voice Agent Platform
How to choose an AI voice agent platform: build-vs-buy, Vapi vs Retell vs Bland vs LiveKit, latency, voices, integrations, pricing and compliance. A practical guide.
Read · 8 min →Houston & LocalBest AI Automation Companies in Houston (2026)
The best AI automation companies in Houston for 2026 and how to vet them — use cases, integrations, pricing and proof — so you automate the right work first.
Read · 7 min →Business & GrowthHow to Choose a CRM: A 7-Step Framework
How to choose a CRM in 7 steps: map your process, list must-have features, set a budget, check integrations, and plan adoption. Pick with confidence.
Read · 8 min →