If by “full residency process” you mean more than filing a visa—i.e., eligibility assessment, document preparation/apostilles, immigration filing, residency card, banking, housing, healthcare, and settling-in support—there are a few firms that stand out.
My shortlist
Firm
Best fit
Evidence of experience / scope
Expatsi
Americans who haven't chosen a country yet
Says it has helped thousands of Americans plan moves and has vetted specialists for visas, paperwork, money and settling in. It covers Portugal, Spain, Mexico, Panama, Costa Rica and other destinations.
Expatsi says Viv Europe has helped 1,000+ families move to Portugal since 2020, covering visas, paperwork, insurance and real estate from start to finish.
Turnkey Panamá
Panama retirees
Particularly compelling for U.S. retirees: handles the Pensionado process from the U.S. side—including apostilles, FBI background check and consular paperwork—and continues through housing, banking, healthcare and shipping.
Panama Relocation Firm
Panama, especially people wanting legal + financial + property support
Claims 500+ clients relocated since 2013, with licensed Panamanian attorneys handling Pensionado/Friendly Nations residency, property, banking, corporate matters and relocation.
NDM Law Firm
Panama retirees wanting an established legal firm
Says it has guided hundreds of American retirees through the move and handles Pensionado applications, property review and U.S.-side documentation.
Relocate360
Portugal, white-glove service
Explicitly markets end-to-end U.S.–Portugal relocation for retirees, including visa applications, housing and day-to-day settlement.
Who I would investigate first
1. Turnkey Panamá — if Panama is on your shortlist.
This is probably the closest match to your exact wording. Their service is designed around American retirees, starts before you leave the U.S., and continues after residency approval. They specifically cover the awkward parts—apostilles, FBI report, consulate, immigration—and then banking, housing and healthcare.
2. Viv Europe — if Portugal is your destination.
The reported 1,000+ families figure is substantial, and the scope is unusually broad: visa + paperwork + insurance + real estate.
3. Expatsi — if you haven't decided where to retire.
I'd use them earlier in the process rather than immediately hiring a country-specific firm. They specifically work with Americans and compare destinations while connecting clients with vetted specialists.
4. Panama Relocation Firm / NDM — if you want a more legal/immigration-heavy approach in Panama.
Panama Relocation Firm reports 500+ relocations and offers an unusually broad combination of immigration, property, banking and legal services. NDM emphasizes its experience with hundreds of American retirees.
One important distinction
I would not choose solely on the number of clients a company claims. A relocation consultant isn't necessarily an immigration attorney, tax adviser, or financial planner. For an American retiree, the ideal team usually has three distinct competencies:
Immigration/residency attorney — gets you legally resident.
Cross-border U.S./local tax professional — determines how Social Security, pensions, IRA/401(k), investments and property will be treated.
For example, Panama's Pensionado program can be quite straightforward, but U.S. tax obligations don't disappear simply because you become a resident elsewhere. Current retirement-destination research also shows that the residency rules and financial/tax implications vary substantially by country.
If you tell me which 2–4 countries you're considering (e.g. Panama, Costa Rica, Portugal, Mexico, Spain), I can do a much deeper comparison of the actual consultants—including years in business, number of Americans/retirees served, attorney credentials, pricing, reviews, and exactly what is included in their “full-service” packages.
Yes. Based on the current evidence, there isn’t one universally dominant relocation consultant; the strongest choice depends heavily on the destination. For an American retiree who wants someone to manage the process rather than simply provide advice, I’d shortlist these:
Firm
Best for
Evidence of experience
End-to-end scope
Roots Global
Portugal / Spain / Europe
Reports 2,200+ client engagements from 2019–June 2026, with 72.9% of clients being Americans; retirees/passive-income movers are its largest American cohort.
Visa/residency, legal work, tax, housing, banking, registrations and other relocation tasks.
Spain Relocation
Spain
500+ US/UK cases, 7+ years operating, and 100% of its client base is US/UK nationals.
Visa/residence permits, NIE/NIF, tax residency, banking, housing, insurance and other practical settlement services.
Geostrata
Choosing among European countries
Specifically markets itself around relocating Americans, including retirees, across 20+ European countries.
Particularly comprehensive: country selection, visa application through local law firms, residence permit, housing, insurance, tax consultation, shipping, pets and integration.
Panama Relocation Firm
Panama
Claims 500+ clients relocated, 20+ years combined experience and 15+ visa types handled.
Immigration attorneys plus residency, real estate, banking, tax/estate-related services, apostilles, translations, healthcare and settling in.
Turnkey Panamá
Panama retirees specifically
More narrowly focused on American retirees and the Pensionado route rather than general expats.
Starts with U.S.-side documents/apostilles and continues through residency, housing, banking, healthcare and shipping.
Elena Alonso Gestoría
Spain, particularly retirees
Reports 500+ cases, 15 years in Spain, and extensive U.S.-client specialization; one recent case involved a retired couple using Social Security + IRA distributions.
Visa, apostilles, translations, submission, TIE, empadronamiento and healthcare, with U.S.-tax issues incorporated into the planning.
Mitos Relocation Solutions
Retirement relocation generally
Unusually focused exclusively on retirees rather than mixing retirees with digital nomads, students, investors, etc.
Claims a continuous service from destination planning through visas, tax, healthcare, real estate and settling in.
My ranking for an American retiree
1. Roots Global — strongest evidence of scale
If you're considering Portugal or Spain, this is probably the first firm I'd interview. Its reported 2,200+ engagements and the fact that Americans represent nearly three-quarters of its clientele are unusually strong evidence of experience. More importantly, its retiree/passive-income clients are described as its largest American cohort.
It also explicitly combines immigration lawyers with the practical relocation side rather than leaving you to coordinate several companies yourself.
2. Geostrata — strongest for deciding where to retire in Europe
This would be my choice if you haven't settled on a country yet. It evaluates more than 20 European countries and acts as a project manager coordinating immigration lawyers, tax professionals, housing, insurance and other services.
That's an important distinction: many "relocation consultants" are really single-country visa companies.
3. Spain Relocation / Elena Alonso — strongest Spain-specific options
If Spain is already your target, I'd favor a Spain specialist over a general European consultant.
Spain Relocation reports 500+ U.S./U.K. cases and seven-plus years of operation. spain-relocation.com Elena Alonso's practice is smaller but particularly interesting for retirees because it specifically handles the Non-Lucrative Visa and has documented retiree cases.
4. Panama Relocation Firm / Turnkey Panamá — strongest Panama choices
For Panama, I'd put these ahead of generic international relocation firms. Panama Relocation Firm has the stronger publicly stated scale numbers, while Turnkey Panamá is unusually retirement-specific and explicitly starts the process while you're still in the United States—apostilles, background checks and consular paperwork—then continues through housing, banking and healthcare.
One important caveat
I would not choose based on a firm's claimed "success rate" alone. Some firms advertise very high approval rates or impressive client counts, but those figures are self-reported. For a retiree, I'd want the consultant to demonstrate experience with your specific situation:
Social Security + pension + IRA/401(k) income
Investment income
Medicare/health insurance implications
U.S. tax filing and foreign-account reporting
Apostille/background-check requirements
Spouse/dependent residency
Buying vs. renting property
Opening a foreign bank account as a U.S. citizen
What happens after the initial residency card
Renewal and eventual permanent-residency/citizenship strategy
That last point is particularly important. Getting the initial visa is only one piece of retirement relocation.
If you're starting from zero
I'd actually interview 3 firms before choosing one:
Roots Global — for a broad Portugal/Spain/Europe comparison.
Geostrata — for an independent-ish second view of which European country fits you.
A country-specific specialist once you've narrowed the destination.
That gives you a useful check against the problem of a consultant recommending the country they happen to sell.
If you tell me which countries you're considering (e.g., Portugal, Spain, Panama, Costa Rica, Mexico, Italy) and roughly whether you're a single retiree or couple + your approximate monthly retirement income, I can narrow this to the 3–5 consultants with the deepest relevant experience and compare their fees, services, reputation, and actual residency/legal capabilities.
