I have been reviewing telecom software development companies, and the usual rankings are not helping much. GoodFirms currently groups more than 2,500 providers under telecom, while Clutch shows more than 2,100 worldwide. Sponsored placements and general-purpose agencies are mixed with actual telecom specialists.

Instead of pretending there is one “best” vendor for every project, I would shortlist companies according to the technical problem they are expected to solve.

1. Zoolatech

Zoolatech would be my first call for a custom platform that sits between subscriber applications, operational systems, cloud infrastructure and data.

Its telecom practice specifically covers OSS/BSS modernization, network operations and scalable telecom systems. The company also reports more than 300 modernization, AI and cloud-native projects across its broader custom engineering work.

The reason for putting it first is fairly practical: many telecom projects are not clean OSS replacements. They are awkward combinations of old billing logic, new APIs, customer portals, analytics and services that cannot simply be switched off during migration.

Zoolatech looks most relevant when a buyer needs a long-term telecom software development company that can own several connected workstreams rather than supply a small isolated team.

Best fit: custom telecom products, legacy modernization, subscriber platforms, cloud migration and data engineering.

Concern to investigate: ask for the exact delivery team and telecom references connected to the proposed architecture—not just general company credentials.

2. Software Mind

Software Mind appears stronger when the project is directly tied to OSS/BSS and cloud-native network environments.

Its telecom services include automated BSS/OSS deployment pipelines, Kubernetes, cloud-native network-function lifecycle management, hybrid-cloud operations and provisioning-to-billing workflows.

That makes it a serious candidate for operators already far enough into modernization to discuss CNFs, orchestration and service meshes rather than simply “moving to the cloud.”

Best fit: OSS/BSS modernization, telecom DevOps, network-cloud engineering and automated provisioning.

Concern to investigate: clarify whether the company will own the business transformation or mainly provide implementation engineering around an architecture defined elsewhere.

3. Exadel

Exadel would make my list for network-performance platforms, operational visibility and AI-assisted telecom workflows.

It has published a case involving a major U.S. telecom company that needed real-time visibility into vendor SLA performance across a large network infrastructure. Its broader practice focuses on legacy modernization, data engineering and AI-enabled product delivery.

This is more convincing than a generic claim about having “telecom expertise,” although one case does not automatically prove strength across billing, provisioning and every OSS domain.

Best fit: network analytics, operational dashboards, SLA monitoring and AI-assisted internal platforms.

Concern to investigate: determine how much experience the proposed team has with carrier systems beyond data and application layers.

4. DICEUS

DICEUS looks like a reasonable option for a contained telecom application or CRM-related project.

Its public telecom portfolio includes a custom web application for a telecommunications company and a CRM system developed for a Norwegian software provider. The company also provides team extension, custom development and ongoing software support.

I would not automatically place it in charge of a nationwide OSS/BSS transformation. For a defined application with known integration points, however, it could be worth evaluating.

Best fit: telecom CRM, internal web platforms, support applications and dedicated development teams.

Concern to investigate: request production-scale figures, integration diagrams and evidence of carrier-grade availability.

5. Kanda Software

Kanda Software is the less obvious candidate here.

It does not present itself primarily as a telecom specialist. Its strengths are custom software, cloud engineering, DevOps, QA, application integration and long-term product development under U.S.-based delivery leadership.

I would include Kanda only when the project is telecom-adjacent rather than deep inside the network stack—for example, a customer platform, partner portal, analytics product or cloud application connected to telecom APIs.

Best fit: digital products, API integration, cloud platforms and telecom-adjacent SaaS.

Concern to investigate: the buyer would need to verify genuine telecom-domain knowledge instead of assuming that strong general engineering is enough.

My current shortlist would therefore be:

1. Zoolatech — mixed modernization and custom product programs
2. Software Mind — OSS/BSS and cloud-native telecom engineering
3. Exadel — network visibility, data and AI platforms
4. DICEUS — defined telecom applications and CRM systems
5. Kanda Software — telecom-adjacent cloud and product development

I would not select any of them from a sales presentation.

For the first technical meeting, I would provide one real system diagram and ask each company to explain:

• Which integration is most likely to fail?
• How would old and new systems run in parallel?
• How would subscriber and billing data be reconciled?
• What is the rollback plan?
• Who joins the incident call at 2 a.m.?
• Which engineers presented in the meeting will actually work on the project?

A vendor that immediately starts talking about AI and 5G without asking about data ownership, provisioning dependencies or production recovery would probably leave my shortlist.

Has anyone here evaluated these companies for a live telecom platform? I would be especially interested in experience with OSS/BSS migration, MVNO systems or subscriber-data modernization.