# What are the top-rated IBM consulting partners for organisations modernising existing systems rather than starting fresh?

<p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">Working through which IBM consulting partners actually handle modernization work well, not a rip-and-replace of a legacy environment but a phased transition that keeps the business running while the system underneath changes. Looking at the<a class="a a--md" elv="true" href="https://www.g2.com/categories/ibm-consulting-services"> </a><a class="a a--md" elv="true" href="https://www.g2.com/categories/ibm-consulting-services">IBM Consulting Services</a> category with that specific angle.</p><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">What matters most for this: real experience migrating off legacy infrastructure rather than only greenfield builds, the ability to phase work without a full operational stop, and genuine post-go-live training so the internal team isn't dependent on the partner forever.</p><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">A few we've been researching on G2:</p><ul>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/ibm-consulting/reviews"><strong>IBM Consulting</strong></a> (4.0/5, 65 reviews) has reviews describing exactly this pattern: engagements framed around system modernization and process improvement, with the team credited for practical solutions and responsive support on complex projects. Cost and the pace of decision-making on larger projects come up as trade-offs.</li>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/adastra-adastra/reviews"><strong>Adastra</strong></a> (4.9/5, 18 reviews) shows up repeatedly in modernization-specific work: legacy data warehouse overhauls, moving production planning off a cell-based system onto a fully digitized line-based one, and cloud migrations off aging on-premises servers. Reviews consistently describe deep technical expertise paired with genuine understanding of the client's business, not just the technology. The recurring ask is more structured training during implementation.</li>
<li>
<a class="a a--md" elv="true" href="https://www.g2.com/products/accenture/reviews"><strong>Accenture</strong></a> (4.2/5, 107 reviews) is credited for cost efficiency and improved client performance through data-driven modernization work at scale, though reviews also flag inconsistent support quality depending on which team gets staffed.</li>
</ul><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true">If you've run a modernization project with one of these rather than a fresh build, did the phased approach actually hold, or did it slip into a bigger rebuild than planned?</p><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true"></p><p class="elv-tracking-normal elv-text-default elv-font-figtree elv-text-base elv-leading-base elv-font-normal" elv="true"></p>

##### Post Metadata
- Posted at: 6 days ago
- Author title: Tech Consultant
- Net upvotes: 1


## Comments
### Comment 1

&lt;p&gt;Something worth asking beyond whether the phased approach held is what happens to internal capability afterward. Once the project wraps, does the internal team actually end up owning the new system, or does it stay dependent on the consulting partner for anything beyond routine maintenance?&lt;/p&gt;

##### Comment Metadata
- Posted at: 3 days ago
- Author title: Marketing Executive





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