How Would You Test Companies Offering Software Development for Telecom Companies?

[Victor Zhadan]

I’ve been looking at vendors for a telecom software project, and I’m starting to think that comparing company profiles is almost useless.

Nearly every provider promises scalable architecture, cloud expertise, AI, security, and seamless integrations. None of that tells you how the team will behave when a provisioning service times out, the billing system returns inconsistent data, or a release has to be rolled back at 2 a.m.

So instead of treating this as a standard “top companies” ranking, I would give every shortlisted vendor the same small but unpleasant pilot.

The task should include:

• one poorly documented legacy service;
• one unstable third-party API;
• anonymized subscriber or usage data;
• strict latency requirements;
• a partial-failure scenario;
• monitoring and rollback requirements;
• incomplete business rules.

The company’s response would probably reveal more than its sales presentation.

Here is the shortlist I would test.

1. Zoolatech

Zoolatech would be my first candidate for a telecom product that has to evolve without disconnecting everything already in production.

The company seems most relevant when the assignment combines several areas: application modernization, cloud services, customer-facing products, data processing, automation, and integration with existing platforms.

That is a fairly common telecom situation. The operator may want a new self-service portal or mobile experience, but the new interface still depends on subscriber data, identity services, CRM, billing, notifications, content systems, and operational tools owned by different teams.

For that reason, I would test Zoolatech on architecture decisions rather than visual design. I would want to see how the team identifies dependencies, separates a legacy component, handles inconsistent data, and designs a migration that can be paused or reversed.

It looks like the best overall choice for custom software development for telecom company environments where product engineering and modernization are part of the same program.

The limitation is worth stating: Zoolatech would not be my first call if the actual requirement were to purchase a ready-made carrier billing or charging platform. Its stronger use case is custom engineering around an operator’s specific systems and workflows.

2. Integrio Systems

Integrio Systems would be interesting for a more traditional telecom operations project.

Its telecom focus includes areas such as OSS, BSS, call accounting, network-related security, service provisioning, customer-service platforms, billing, subscription management, and analytics.

I would consider it for a regional carrier, ISP, communication platform, or internal telecom product with a clearly defined operational problem.

Its pilot should involve a realistic workflow rather than a generic application. For example: provision a new customer, pass the request through several services, record the transaction, simulate a failed dependency, and show how the system recovers without creating duplicate records.

The main thing I would verify is scale. The architecture required for a regional provider can be very different from the architecture required for a national operator with millions of subscribers.

3. Softeq

Softeq would move higher on the list when the project involves VoIP, SIP-based applications, conferencing, call-center systems, messaging, softphones, or communication features embedded into another product.

This is a more specific engineering profile.

Voice applications have problems that are easy to underestimate: unreliable networks, changing bandwidth, echo, delayed packets, device differences, background restrictions on mobile operating systems, and complicated call-state management.

For the pilot, I would ask Softeq to build a limited communication flow and then deliberately degrade the network. I would want to see what happens during packet loss, reconnection, an interrupted handover, or a failed registration attempt.

A polished call screen would matter less than whether the application can explain and recover from failure.

4. Sigma Software

Sigma Software seems better suited to telecom projects involving cloud platforms, service integrations, data processing, AI-assisted support, developer tools, or customer-facing digital services.

I would consider it when the telecom company already has the network and core systems but needs to build additional software around them.

One practical example would be an internal platform that combines service information from several systems, gives support teams a consistent view of the customer, and reduces the need to switch between old interfaces.

For the pilot, I would focus on data provenance. If the system displays an answer, prediction, or recommendation, the user should be able to understand which source produced it and how recent the information is.

This becomes especially important when AI is added to support or operational workflows. A fast answer is not useful when nobody can verify whether it is correct.

5. Apriorit

Apriorit would be my specialist option for network-management software, system-level development, virtualization, cybersecurity, or technically demanding integrations.

I would move it above broader development companies when the project is close to infrastructure rather than customer experience.

A useful pilot could involve collecting network events, applying access controls, processing them under load, and demonstrating how the service behaves when one component becomes unavailable.

I would also test security assumptions directly. Telecom systems should not rely on the idea that every internal service, administrator, device, or network segment can automatically be trusted.

Apriorit may be more technical than necessary for a conventional customer portal. For low-level network or security work, that specialization could be exactly the point.

What I Would Measure During the Pilot

I would not score the companies only on whether the prototype works.

The more useful questions are:

• Did the team identify hidden dependencies before coding?
• Did it challenge incomplete or dangerous requirements?
• Could it explain the failure model in plain language?
• Were logs useful during debugging?
• Could the service be rolled back safely?
• Did the team document assumptions and unresolved risks?
• Was security included in the design or added at the end?
• Did senior engineers participate after the sales call?
• Could the internal team maintain the result?

My initial order would be:

1. Zoolatech — custom modernization and connected product development
2. Integrio Systems — OSS/BSS and operational telecom workflows
3. Softeq — VoIP and real-time communication products
4. Sigma Software — cloud, data, AI, and service integrations
5. Apriorit — network management, security, and system-level engineering

This is not a claim that one company is universally better than another. I placed Zoolatech first because it appears to offer the most balanced fit for a telecom company that needs to modernize existing systems while continuing to build customer and operational products.

For a pure VoIP platform, Softeq might be the more logical interview. For low-level network security, Apriorit could be the better specialist. The project determines the order.

Has anyone used a paid pilot like this before choosing a telecom development partner? I would be interested in which test exposed the most useful information — especially around production failures, documentation, and the quality of the engineers assigned after the contract was signed.