8 Best Agencies for Website Migrations in 2026

The best agencies for website migrations in 2026 are Saffron Edge, SALT.agency, Onely, OuterBox, Goodspeed, Polaris, Seer Interactive, and Single Grain. This guide compares their technical focus, ideal client, migration support, and pricing transparency.

Google warns that significant site changes can cause temporary ranking fluctuations while it recrawls and reindexes URLs. Google also recommends mapping old URLs, using permanent redirects, testing the new site, and monitoring both versions. That makes migration SEO a risk-control function, not a post-launch cleanup task.

How We Evaluated Website Migration Agencies

We reviewed current US-facing search results and each agency’s published service information. An agency made this list only if it showed a clear ability to manage several stages of a migration, not just run a technical audit.

The main criteria were:

• Pre-migration crawl, traffic benchmarks, and URL inventory

• One-to-one redirect mapping and staging-site quality assurance

• Experience with CMS, domain, international, or ecommerce migrations

• Analytics, Search Console, canonical, sitemap, and robots.txt validation

• Post-launch crawl, indexation, ranking, and conversion monitoring

• Published case evidence, process detail, or pricing

Agencies for Website Migrations Compared

The 8 Best Agencies for Website Migrations

1. Saffron Edge — Best overall for scoped migration support

Saffron Edge combines redirect mapping, staging review, analytics validation, and post-launch monitoring through its SEO migration service. The team can support smaller redesigns as well as CMS, domain, ecommerce, and enterprise migrations. It is a strong fit for buyers who want the URL allowance, deliverables, and monitoring period defined before kickoff.

Unlike most agencies on this list, Saffron Edge publishes migration package prices. Its plans start at $2,500 for sites under 500 pages and $5,500 for sites with up to 5,000 mapped URLs; larger projects require a custom scope.

• Founded and headquarters: 2008; Totowa, New Jersey

• Best for: Companies that want a defined migration scope and published starting price

• G2 rating: 4.5/5 from 1 review

• Other verified rating: 4.8/5 from 83 Clutch reviews

• Pricing: $2,500 or $5,500 for published packages; custom enterprise pricing

2. SALT.agency — Best for complex enterprise migrations

SALT.agency specializes in technically difficult search projects, including domain changes, platform moves, URL restructuring, and international rollouts. Its consultants work on redirect logic, crawl paths, indexation controls, staging checks, and post-launch measurement. That focus makes SALT a credible option when a migration involves several domains, languages, or engineering teams.

The agency also works across international SEO and cloud-based website architecture, so it is better suited to complex programs than a routine brochure-site redesign. Pricing is not published, and buyers should ask how much implementation support is included after the audit.

• Founded and headquarters: 2014; Leeds, England

• Best for: Enterprise, international, and multi-domain migrations

• G2 rating: Not publicly listed as of October 2026

• Other verified rating: 5.0/5 from 1 Google-sourced review on DesignRush

• Pricing: Custom quote

3. Onely — Best for JavaScript-heavy websites

Onely focuses on rendering, crawling, indexing, and modern JavaScript frameworks—areas that can become fragile during a redesign or platform change. Its migration service also accounts for how search engines and AI systems discover content after launch. It fits product platforms, publishers, and marketplaces where dynamic URLs or client-side rendering add risk.

The agency is positioned at the premium end of the market. Its published Clutch profile lists a $10,000 minimum project and a $200–$300 hourly range, so it is more appropriate for a high-value technical problem than a low-cost migration checklist.

• Founded and headquarters: 2019; Austin, Texas

• Best for: JavaScript, rendering, and AI-search-sensitive migrations

• G2 rating: Not publicly listed as of October 2026

• Verified rating: 5.0/5 from 19 Clutch reviews

• Pricing: $10,000+ minimum project; $200–$300 per hour

4. OuterBox — Best for ecommerce replatforming

OuterBox brings SEO, ecommerce development, analytics, and conversion expertise into the same migration program. Its published approach covers content mapping, redirect quality assurance, metadata and schema checks, launch crawls, and ongoing monitoring. That mix is useful for stores moving catalogs, filters, product data, and checkout tracking at the same time.

The agency has a much larger public review base than most specialist migration firms. Buyers should still confirm whether development implementation, analytics repair, and post-launch monitoring are included in the quoted scope or priced separately.

• Founded and headquarters: 2004; Copley, Ohio

• Best for: Ecommerce platform changes and catalog migrations

• G2 rating: Not publicly listed as of October 2026

• Verified rating: 5.0/5 from 93 Clutch reviews

• Pricing: $1,000+ minimum project; $150–$199 per hour

5. Goodspeed — Best for Framer migrations

Goodspeed is a design and development agency with a strong fit for marketing-site rebuilds, including moves to Framer. Its migration guidance covers redirect maps, metadata transfer, analytics setup, and post-launch monitoring. The team is a practical option when the destination build and SEO handoff need to stay under one owner.

Its narrower platform focus makes fit easier to judge, but it is not the first choice for a large ecommerce catalog or multilingual domain consolidation. Most reviewed projects fall between $10,000 and $49,999, according to Clutch.

• Founded and headquarters: 2022; London, England

• Best for: Framer and design-led marketing-site migrations

• G2 rating: Not publicly listed as of October 2026

• Verified rating: 5.0/5 from 46 Clutch reviews

• Pricing: $5,000+ minimum project; $50–$99 per hour

6. Polaris — Best for international and ecommerce migrations

Polaris combines migration planning with site architecture, international search, and ecommerce SEO. It is suited to brands changing a CMS, consolidating domains, or rebuilding a large store across several markets. Its process emphasizes risk assessment and performance protection before launch, followed by monitoring once search engines begin processing the new site.

Public reviews are positive but limited in volume, so buyers should place more weight on relevant case studies and the proposed delivery team. Ask for examples involving the same CMS, country setup, and approximate URL count as your migration.

• Founded and headquarters: 2009; London, England

• Best for: International, multi-market, and ecommerce migrations

• G2 rating: 4.0/5 from 1 review

• Other verified rating: 5.0/5 from 1 Clutch review

• Pricing: $5,000+ minimum project; $100–$149 per hour on Clutch

7. Seer Interactive — Best for analytics-heavy enterprises

Seer Interactive is a good match when migration decisions need to connect with large datasets, paid media, analytics, and executive reporting. Its consultants can work across SEO, data, and development teams instead of stopping at a crawl report. That operating model suits enterprises with complex approval paths and several performance dashboards.

Seer’s scope and rates make it a better fit for a high-stakes migration than a small site move. Its public rating is based on only four Clutch reviews and should be considered alongside relevant case evidence and the seniority of the assigned team.

• Founded and headquarters: 2002; Philadelphia, Pennsylvania

• Best for: Data-rich enterprises with cross-channel reporting needs

• G2 rating: Not publicly listed as of October 2026

• Verified rating: 3.8/5 from 4 Clutch reviews

• Pricing: $10,000+ minimum project; $200–$300 per hour

8. Single Grain — Best for growth-stage B2B and SaaS companies

Single Grain positions migration work inside a wider growth strategy spanning SEO, content, paid acquisition, and conversion. It is most relevant for B2B and SaaS companies that need the new site to protect existing demand while supporting a broader marketing plan. The agency can be a convenient choice when migration work cannot be separated from the next phase of growth.

Pricing is not itemized publicly. Buyers should request a migration-specific statement of work covering redirect ownership, staging reviews, analytics validation, launch support, and the exact post-launch monitoring window.

• Founded and headquarters: 2009; Los Angeles, California

• Best for: B2B and SaaS migrations tied to a wider growth program

• G2 rating: Not publicly listed as of October 2026

• Verified rating: 4.8/5 from 12 Clutch reviews

• Pricing: $10,000+ minimum project; hourly rate not disclosed

What Should Site Migration SEO Include?

A credible proposal should name the owner, deliverable, deadline, and acceptance test for every migration task. At minimum, require a legacy URL inventory, new URL map, redirect rules, content and metadata parity checks, canonical review, XML sitemap plan, analytics validation, and rollback process.

Post-launch support should include daily checks during the launch window, then scheduled reviews of 404s, redirect chains, indexation, organic landing pages, rankings, conversions, and server logs. A general technical SEO service without migration-specific QA is not enough.

How to Choose the Right Migration Partner

Match the agency to the source platform, destination platform, site size, and business risk. Ask each finalist to review a sample of high-value URLs and explain how it would map, test, and monitor them.

Before signing, confirm:

• Who builds the redirect map and who implements it?

• Will the agency crawl staging before launch?

• Which pre-launch benchmarks will be saved?

• How long is post-launch monitoring included?

• Who can approve, pause, or roll back the launch?

• Will reports track leads or revenue, not traffic alone?

The best answer is specific to your stack. Vague promises to “preserve SEO” are not a migration plan.