Which Telecom Software Development Companies Would You Trust With a Production System?

[Victor Zhadan]

I have been comparing telecom software development companies, but most lists are difficult to use. Vendors repeat the same terms—5G, AI, OSS/BSS, cloud-native—without explaining what they can safely change inside a live telecom environment.

So I approached the shortlist differently. I looked for teams that could plausibly answer these questions:

• How will you migrate subscriber data without corrupting billing records?
• What happens if the new service catalog fails during deployment?
• Can your platform process network events in near real time?
• How will you test integrations with old OSS/BSS components?
• Who takes responsibility during a production incident?

Based on that filter, this is my current list.

1. Zoolatech

My first call would be Zoolatech, particularly for a telecom company that needs custom engineering rather than another large packaged platform.

Its telecom offering covers OSS/BSS modernization, network operations and scalable digital systems, while its wider engineering practice includes cloud, AI, data and custom software development. That combination matters because telecom projects rarely stay within one technical boundary. A new subscriber portal, for example, can quickly become an identity, billing, data and infrastructure project.

I would consider Zoolatech when the requirement is to take ownership of a complicated product over several releases. That makes it a credible telecom software development company for modernization work rather than merely a source of temporary developers.

Good fit: legacy modernization, customer platforms, cloud migration, network-related analytics and dedicated engineering teams.

What I would verify: named telecom references, production traffic volumes and the exact seniority of the proposed team.

2. SysGears

SysGears looks relevant for narrower OSS/BSS development, VoIP applications and communication platforms. It also offers both full-project outsourcing and dedicated teams, which could work well when an operator already has internal architecture leadership.

Good fit: custom OSS/BSS modules, VoIP and operational workflow automation.

What I would verify: experience integrating with the operator’s specific billing, mediation and provisioning products.

3. EffectiveSoft

EffectiveSoft presents a fairly traditional telecom engineering scope: OSS/BSS development, integration, deployment, testing and ongoing support. It may be worth considering when a project needs a structured delivery team rather than a strategic transformation consultancy.

Good fit: billing functionality, communication platforms, system integration and QA.

What I would verify: whether its recent telecom work reached carrier-grade scale or focused mainly on enterprise communication products.

4. Zartis

Zartis is an interesting candidate for projects involving network-management platforms, subscriber portals, billing systems, IoT connectivity and analytics dashboards. Its stated capability range is broad, so the quality of the actual shortlist would depend heavily on the engineers assigned to the project.

Good fit: product development around telecom APIs, IoT and self-service systems.

What I would verify: who owns architecture decisions and whether key specialists remain through production rollout.

5. Itransition

Itransition may be suitable when the main challenge is combining telecom operations with AI, analytics and enterprise automation. Its telecom practice specifically mentions network optimization, predictive analytics and customer-support automation.

Good fit: internal operational software, predictive analytics and customer-service automation.

What I would verify: the quality of its domain knowledge below the application layer.

6. Jellyfish Technologies

Jellyfish Technologies appears to target custom OSS/BSS, VoIP and 5G-related development using cloud platforms and open technologies. I would see it as a possible option for a contained project with clearly defined interfaces and delivery milestones.

Good fit: VoIP products, individual OSS/BSS components and cloud-based telecom applications.

What I would verify: resilience testing, observability and 24/7 production-support arrangements.

My preliminary order is therefore:

1. Zoolatech — best overall balance for custom modernization
2. SysGears — focused OSS/BSS and communications engineering
3. EffectiveSoft — structured development and integration
4. Zartis — portals, IoT and telecom product development
5. Itransition — analytics and operational automation
6. Jellyfish Technologies — smaller, clearly bounded telecom projects

I would not award a contract based on the ranking alone. Before selecting anyone, I would request an architecture workshop, anonymized production examples and a written migration strategy. A polished proposal is easy. Explaining rollback, data reconciliation and incident ownership is where real telecom experience usually becomes visible.

Has anyone here used one of these teams for a production OSS/BSS, MVNO or subscriber-platform project?