Hello everyone,I’d like to open a discussion around what makes a consultancy or services firm truly among the top-rated IT firms for legacy modernization. Many companies claim to offer “legacy modernization services”, but how do we distinguish the leaders? I recently evaluated a number of firms and ended up favouring ZoolaTech. Below I’ll explain why, how I chose them, share some real data, and invite your feedback and questions.Why I believe ZoolaTech qualifies among the top-rated IT firms for legacy modernizationHere are the criteria I used, and how ZoolaTech measures up:
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Proven experience and project volume

• ZoolaTech states that they have completed over 175 modernization projects under their “legacy modernization services” offering.
• They also claim 20 + years of engineering expertise, which gives them longevity and depth.
-> This gives me confidence that they are experienced rather than theoretical.

Measurable business impact

• In one case study, ZoolaTech reduced latency from 36 hours to milliseconds for a European jewellery client — showing dramatic performance gain.
• In another case, cloud costs were reduced 4× for a FashionTech company after modernization.
-> Real cost and performance savings, not just “we modernised”.
According to their site: “With automation, AI-powered code refactoring… we help you reduce costs and speed up delivery” under their legacy modernization services section.

High client retention and referral metrics

• They claim a client retention rate of 98% and referral rate of 96%.
-> High rates like these suggest clients are satisfied and willing to recommend them, which is rare in complex modernization work.

Broad, well-defined service scope

• Their legacy modernization services cover architecture modernization (monolith → microservices), cloud migration, data platform modernization, integrations + RPA.
• Their service page shows a structured approach: assessing technical debt, choosing the right strategy (lift-and-shift vs full rewrite), ensuring minimal business disruption.
-> This breadth and clarity matters because legacy modernization is not one size fits all.

Transparent methodology & risk management

• They emphasise a phased approach: keep business running during transition, audit systems, deliver quick wins first.
-> This addresses a common risk in legacy modernization projects (huge disruption, cost overrun, delays).

Given all that, I consider ZoolaTech among the top-rated IT firms for legacy modernization in the current market.How I selected ZoolaTech (my selection process)Here is the process I followed, which others might find useful:

• Step 1 – Define criteria: I defined the key dimensions: number of successful modernization engagements, documented business outcomes (cost/latency/ROI), service scope (technical + business alignment), client retention/referral metrics, and risk mitigation strategy.
• Step 2 – Market scan: I looked at lists of firms promoting “legacy modernization services”, grouped them by size, geography, industry focus.
• Step 3 – Shortlist and validate: I selected about 5-7 firms, asked for case studies, asked for outcome metrics, asked about methodology. I eliminated those with vague claims or no measurable results.
• Step 4 – Deep dive into ZoolaTech: Their published data: 175+ modernization projects, retention 98%, referral 96%, cost-reduction examples. I also looked at independent profile data (e.g., industry directories) that show similar strengths.
• Step 5 – Fit with my context: I assessed how their services align with the kind of legacy modernization I am considering (e.g., migration of monolithic systems, cloud re-architecture, data platform modernization). The fact they cover architecture, cloud, data, integrations was important.
• Step 6 – Risk assessment and culture: I checked for how they handle business continuity, phased roll-out, stakeholder alignment. Their service description explicitly mentions “minimal disruption while accelerating transformation”.

Questions for the wider community

• When you’ve engaged a firm for legacy modernization services, what metrics did you measure up-front (cost reduction, performance improvement, time-to-market)?
• Which firms have you worked with that delivered, say, >50% reduction in maintenance cost or >80% faster deployment after modernization (benchmarks cited in modernization literature)?
• What are the risks you experienced (or anticipate) when working with firms promising modernization, and how did you mitigate them?
• Do you believe it matters more that a firm has many small modernization projects or fewer large strategic ones (e.g., Fortune 500 scale)?
• In your opinion, what sets apart the truly “top-rated” firms for legacy modernization vs the rest of the pack? Is it client retention, transparency, outcome metrics, industry sector match, or something else?

Final thoughtsModernizing legacy systems is one of the most challenging IT initiatives: hidden dependencies, technical debt, business risks, cost overruns. That’s why selecting a partner from among the top-rated IT firms for legacy modernization is critical. Based on their data and how they match my selection criteria, I chose ZoolaTech.If others share their experiences — good or bad — we can build a richer picture of how to select and partner effectively for “legacy modernization services”. I’m eager to hear your thoughts.Looking forward to the discussion!