API Integration That Makes Systems Talk
You need API integration that stops your team from copying data between systems that should already be connected. Whether you want to hire an API integration company to sync your CRM with your billing platform, bring in experienced API integration specialists for custom API integration between legacy systems and modern tools, or need full API integration services that connect business systems across departments and automate data flow end-to-end, the goal is always the same: eliminate manual data entry, keep every system current, and make sure your team works from one source of truth.
Custom API integration typically costs between $5,000 and $75,000 depending on the number of systems, data complexity, and sync direction. A simple one-way integration (e.g. forms to CRM) starts around $5,000. Complex bi-directional integrations across multiple systems with real-time sync run $25,000 to $75,000.
Core Capabilities and Features
CRM Integrations
Salesforce, HubSpot, Pipedrive, Zoho CRM, and Microsoft Dynamics. Your CRM is connected to marketing platforms, billing systems, support tools, and internal databases so customer data stays consistent everywhere. When a deal closes in your CRM, the billing system creates the invoice. When a support ticket escalates, the sales team sees it. When marketing qualifies a lead, it appears in the sales pipeline automatically.
- Salesforce, HubSpot, Pipedrive, Zoho CRM, and Microsoft Dynamics connected to your full tool stack
- When a deal closes in your CRM, the billing system creates the invoice automatically
- Customer data stays consistent everywhere so every team works from one source of truth
E-Commerce Integrations
Shopify, WooCommerce, BigCommerce, Magento, and custom storefronts. Your store is connected to inventory management, shipping platforms (ShipStation, EasyPost), accounting (QuickBooks, Xero), marketing (Klaviyo, Mailchimp), and customer support (Zendesk, Freshdesk). Orders flow through the entire chain without anyone re-entering data.
- Shopify, WooCommerce, BigCommerce, Magento, and custom storefronts connected end-to-end
- Inventory, shipping, accounting, marketing, and support tools all synced automatically
- Orders flow through the entire chain without anyone re-entering data
Payment and Billing Integrations
Stripe, PayPal, Paddle, GoCardless, and invoice platforms. Payment events are connected to your CRM (deal marked as won), your accounting system (invoice created), your email platform (receipt sent), and your analytics (revenue tracked). Payment integrations require careful error handling for edge cases: failed charges, partial refunds, disputed transactions, and currency conversion.
- Stripe, PayPal, Paddle, and GoCardless connected to your CRM, accounting, email, and analytics
- Payment events trigger automatic invoice creation, receipt delivery, and revenue tracking
- Careful error handling for failed charges, partial refunds, disputed transactions, and currency conversion
Why It Matters
Every hour your team spends manually copying data between systems is an hour they are not spending on work that grows the business. API integration is not glamorous. Nobody celebrates when two systems sync correctly. But the absence of integration is felt every single day: the duplicate records, the conflicting numbers, the manual exports, the "let me check the other system" moments that slow every decision down. When your systems are properly connected, your team works faster because data is where they need it. Your reports are accurate because every system draws from the same source. Your customers get better service because every team member sees the complete picture. And your operations scale because adding a new tool means plugging it into an existing integration layer, not rebuilding every connection from scratch. The teams that get the most from integration are the ones who treat it as infrastructure, not a one-time project. They monitor it. They maintain it. They extend it as the business adds new tools. And they invest in doing it properly because they know the cost of bad integration (conflicting data, manual workarounds, lost trust in reporting) compounds every day it goes unaddressed.
By the Numbers
29%
The average enterprise uses 1,061 applications but only 29% are connected. Every disconnected system creates manual work and data inconsistency.
Source: MuleSoft Connectivity Benchmark, 2025
$500K/yr
Enterprises lose an estimated $500k per year in productivity due to integration gaps. Manual data entry, reconciliation, and system-switching add up fast.
Source: MuleSoft / Tizbi, 2025
84%
Integration is technically challenging. Most failures come from unclear requirements, poor error handling, and scope overload. Starting focused and testing thoroughly is how you succeed.
Source: Integrate.io / Data Transformation Statistics, 2026
60%
Businesses are making 60% more API calls than the prior year, reflecting the growing dependence on connected systems for daily operations.
Source: SQ Magazine / API Statistics, 2026
$4.5M
API-related security incidents are among the most expensive breaches. Broken access controls account for 40% of all API attacks. Every integration needs authentication, authorisation, and encryption.
Source: IBM / OWASP, 2025
"The best integration is the one your team never thinks about. Data just appears where it should, records stay in sync, and nobody wastes time wondering which system has the right number. That invisible reliability is what we build."
Technologies
Our Tech Stack
Our Process
How we turn ideas into reality.
Project Brief
You fill in the short project brief form (takes 5 minutes).
Systems Audit
Your current systems and integration gaps are audited within 24 hours.
Alignment Call
A 30-minute call is scheduled to align on scope, architecture, and budget.
Written Proposal
You receive a written proposal with clear deliverables and fixed pricing.
Pricing
Investment Overview
Number of Systems
Connecting 2 systems is a focused project. Connecting 6 systems with data flowing in multiple directions is a multi-week architecture project.
Sync Direction
One-way data push (form to CRM) is simpler than bi-directional sync (CRM and ERP updating each other) which requires conflict resolution logic.
API Quality
Systems with well-documented REST APIs (Stripe, Shopify, HubSpot) are fast to integrate. Systems with poor documentation, SOAP APIs, or no API at all require significantly more engineering.
Everything we do at Techneth is built around making data move reliably between the systems that matter. If you want to understand our approach before committing, you can read more about our team and how we work. Or explore the full range of digital product and development services we offer, like custom api development and integration. And if you already know what you need, get in touch directly and we will find time to talk.
Frequently Asked Questions
Everything you need to know about this service.
- What is API integration?
- API integration connects two or more software systems so they can exchange data automatically. Instead of manually exporting data from one system and importing it into another, an API integration does this programmatically: creating, reading, updating, and deleting records across systems based on defined rules and triggers. This eliminates manual data entry, reduces errors, and keeps every system current.
- How long does an API integration take?
- A simple one-way integration (e.g. website forms to CRM) takes 1 to 2 weeks. A bi-directional integration between two complex systems (e.g. CRM and ERP) takes 3 to 6 weeks. A multi-system integration project connecting 4 or more platforms with custom logic takes 6 to 12 weeks. The timeline depends on API quality, data complexity, and testing requirements.
- Can you integrate with systems that do not have an API?
- Yes. Custom middleware is built for legacy systems, on-premise databases, flat-file-based systems, and FTP/SFTP data drops. If your system stores data in a database (MySQL, MSSQL, Oracle, PostgreSQL), it can be connected directly. If it exports files on a schedule, those files are processed automatically. No API is ideal, but no API is not a dealbreaker.
- How do you handle data conflicts?
- When two systems can update the same record, conflicts are inevitable. Conflict resolution rules are implemented during the design phase: last-write-wins, source-system priority, or manual review queues depending on the data type and business context. For critical data like billing or customer records, every change is logged with timestamps and system of origin so conflicts can be audited and resolved.
- Should I use Zapier or build a custom integration?
- Zapier (or Make/Workato) is excellent for simple, low-volume automations: form submissions to CRM, Slack notifications from events, basic data sync between 2 SaaS tools. Build custom when you need error handling beyond basic retry, custom data transformation, high-volume sync (thousands of records per day), bi-directional sync with conflict resolution, or integration with systems that no-code tools do not support.
- What happens when an API changes?
- APIs evolve. Vendors deprecate endpoints, change response formats, or update authentication methods. Integrations are built with version-pinning (locking to a specific API version) and vendor deprecation notices are monitored. When a change is needed, the integration is updated, tested, and deployed before the old version stops working. Support retainers include API version management.
Ready to get a quote on your custom api development and integration?
Tell us what you are building and we will put together a scoped proposal within 3 business days. Here is what happens when you reach out:
- 1You fill in the short project brief form (takes 5 minutes).
- 2We review it and come back with initial thoughts within 24 hours.
- 3We schedule a 30 minute call to align on scope, timeline, and budget.
- 4You receive a written proposal with fixed price options.
No commitment required until you are ready. Request your free custom api development and integration quote now.
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