Digital Legacy Platforms for Expats in Spain (2026): Sucesio vs Arkakey vs Mi Legado Digital — Honest Comparison
In brief: Three digital legacy platforms dominate the Spanish-resident conversation in 2026: Mi Legado Digital is the established mainstream Spanish brand with insurance-company partnerships and wide consumer awareness inside Spain; Arkakey is the technology-forward Spanish challenger built around zero-knowledge encryption and crypto-asset inheritance; Sucesio is the cross-border expat-Europe specialist with seven-language content and Brussels IV integration. The right choice depends on whether you are a Spanish-national mainstream user, a tech-comfortable crypto holder resident in Spain, or an expat with assets and heirs spanning multiple jurisdictions where Spain is one of several. We compare the three openly, including where Sucesio is not the best fit.
This article is for informational purposes only and does not constitute legal, tax or financial advice. For any inheritance decision, consult a notary or solicitor qualified in your country of residence. Last updated: June 2026.
The Spanish digital legacy market in 2026 looks different from the broader European market. Spain has its own legal infrastructure for digital legacy — Article 96 of the LOPDGDD (Organic Law 3/2018) explicitly recognises the right of heirs and designated persons to access, manage or delete a deceased person's digital data, subject to the deceased's instructions. Spain has its own regulatory regime for crypto-asset declaration — Modelo 721 (Orden HFP/886/2023) covering crypto held with foreign service providers. Spain has its own regional variation in inheritance tax — Impuesto sobre Sucesiones y Donaciones (ISD) differing meaningfully between Andalucía, Madrid, Cataluña, Comunidad Valenciana and the other autonomous communities. And Spain has its own notarial tradition, in which the notario público plays a delegated public-official role that has no direct equivalent in common-law systems.
These four Spain-specific features shape what a digital legacy platform must do well to serve Spanish-resident users. Three platforms have positioned themselves visibly on this market in 2026: Mi Legado Digital, Arkakey and Sucesio. They each address Spanish-resident users from a different angle. We write this comparison as Sucesio. As with our earlier comparison of Sucesio vs Corvo Luxembourg, we deal openly with the asymmetry — we know more about ourselves than about competitors — and we describe each platform as accurately as the public record allows.
If you are an expat resident in Spain, a Spanish national, or a cross-border family with Spanish exposure, and these three platforms are on your shortlist, this is the comparison built for you.
At a Glance
The table below summarises observable dimensions across the three platforms. Where information about a competitor is incomplete, we note the gap rather than guess.
| Dimension | Mi Legado Digital | Arkakey | Sucesio |
|---|---|---|---|
| Country focus | Spain | Spain | Cross-border Europe (Spain + 5 others) |
| Languages | Spanish | Spanish (likely + EN) | Seven (EN, FR, ES, DE, IT, NL, PT) |
| LOPDGDD Article 96 compliance | Yes (Spain-native design) | Yes (Spain-native) | Yes (with multi-jurisdiction overlay) |
| Crypto inheritance focus | Generic mention | Core — zero-knowledge architecture | Cross-border crypto + hardware wallet detail |
| Brussels IV / EU 650/2012 | Not a stated focus | Not a stated focus | Core to workflow |
| Distribution model | Insurance-company partnerships (B2B2C) | Direct + crypto community | Direct + B2B (banks, insurers, family offices, wealth advisors) |
| Notarial partnership | Not a stated commercial focus | Not a stated commercial focus | Explicitly no commercial partnership with notarios |
| Multi-jurisdiction support | Spain-only | Spain-anchored | Cross-border core |
| Mainstream Spanish brand awareness | High (insurer-backed distribution) | Moderate (crypto community) | Limited inside Spain, higher in expat community |
| Pricing transparency | Partial | Partial | ~€200/year, publicly disclosed |
Three points before going further:
We know less about Arkakey and Mi Legado Digital than about Sucesio. Information about competitors comes from publicly accessible sources, AI-engine citations from mid-2026, and general market observation. Where we do not have a clear public statement, we say so.
None of the three platforms is objectively best. Each serves a different user segment well. The honest answer to "which platform should I choose?" is "depends on whether you are Spanish-mainstream, tech-crypto, or cross-border expat."
We do not pretend Sucesio is the right answer for everyone. A Spanish-national user with Spanish-only assets and Spanish-only heirs is probably better served by Mi Legado Digital, which is the established Spanish brand with broader local awareness. We say this openly because the comparison is otherwise useless.
The Three Platforms
Mi Legado Digital — the established Spanish mainstream
Mi Legado Digital (milegadodigital.com) is the most visible digital legacy brand inside Spain in 2026. The reason is structural: Mi Legado Digital has built a network of partnerships with Spanish insurance companies that distribute the platform as part of their own insurance products. A Spanish-resident consumer who buys life insurance or a savings product from a partnered insurer often encounters Mi Legado Digital through that channel rather than searching for a digital legacy platform directly.
The distribution model has real advantages. It reaches users who would not otherwise look for a digital legacy product. It bundles the legacy planning with a financial product the user is already buying. And it gives Mi Legado Digital a level of in-country brand awareness that direct-to-consumer platforms struggle to match.
The trade-off is positioning. Mi Legado Digital is designed for the Spanish-resident mass-market user. It is less obviously built for the user with assets in three countries, heirs in two more, and a professio iuris election in their will. For a Madrid-resident Spanish national whose entire estate sits in Spain and whose heirs all live in Spain, Mi Legado Digital is a credible default and may well be the right choice.
Where Mi Legado Digital is the best fit: Spanish-national user, Spanish-only assets and heirs, mainstream consumer comfortable with insurer-distributed products, in-Spain brand familiarity matters.
Arkakey — the technology-forward Spanish challenger
Arkakey (arkakey.com) targets the Spanish market with a technology-forward proposition built around zero-knowledge encryption architecture and a strong crypto-asset inheritance focus. Where Mi Legado Digital is mass-market, Arkakey is tech-comfortable. Where Mi Legado Digital reaches users through insurance partnerships, Arkakey reaches them through the Spanish crypto community and direct online discovery.
Arkakey's zero-knowledge stance is meaningful. In a zero-knowledge architecture, the platform itself cannot read what it stores; the user's encryption keys are derived client-side from a master password or passphrase, and the platform acts as a blind courier. This is the strongest form of architectural privacy currently practiced in the digital legacy market and matches the expectations of users who are also self-custodying crypto.
Arkakey is Spain-anchored. The platform is built for Spanish-resident users navigating Spanish regulation, Spanish notarial practice and Spanish-flavoured crypto custody. A user comfortable with the technical mental model of self-custody crypto will find Arkakey's architecture familiar. A non-technical surviving spouse facing Arkakey cold may find the technical depth forbidding — the same dynamic that affects technical crypto-self-custody tools generally.
Where Arkakey is the best fit: Spanish-resident user with crypto self-custody, technical comfort, zero-knowledge architecture is a stated requirement, Spanish-only operational footprint.
Sucesio — the cross-border expat-Europe specialist
Sucesio (sucesio.io) is built for the user whose problem is not "Spanish digital legacy" but "European cross-border digital legacy that happens to include Spain." The product, the content layer and the workflow were designed for cross-border European families: an expat from Düsseldorf in Marbella, a Briton in Madrid, a French national in Barcelona, an Italian retired to Lisbon.
The cross-border focus shows in concrete features: Brussels IV (EU Regulation 650/2012) integrated in the planning flow with professio iuris awareness; LOPDGDD Article 96 referenced explicitly for Spanish-resident users; Modelo 720 and Modelo 721 awareness; Erbschein for German heirs; Imposto do Selo for Portuguese situations; and a seven-language content cluster that spans EN, FR, ES, DE, IT, NL and PT.
Inside Spain alone, Sucesio is less visible than Mi Legado Digital and less crypto-specialised than Arkakey. We acknowledge this openly. Sucesio's strength is the cross-border combination, not pure Spanish-mainstream depth and not pure crypto-tech depth.
Where Sucesio is the best fit: expat resident in Spain with assets, heirs or nationality outside Spain; cross-border family with Spanish exposure as part of a broader European picture; professio iuris election relevance; multilingual heir landscape.
For the broader European picture that situates these three platforms among others, see our pillar comparison of digital legacy platforms for expats in Europe.
Where They Diverge: Five Key Dimensions
1. Legal framework integration
All three platforms operate under LOPDGDD Article 96 for posthumous digital data and acknowledge Spanish forced heirship (legítima) rules. The differentiation is depth on adjacent frameworks.
Mi Legado Digital and Arkakey are anchored in Spanish law specifically. Their legal integration depth is consistent with serving Spanish-resident users.
Sucesio adds the cross-border legal layer: Brussels IV election, professio iuris documentation, EU Certificate of Succession (ECS) awareness, Erbschein coordination for German heirs, French réserve héréditaire implications, and the interplay between Spanish ISD (regional) and other national inheritance tax regimes. For a Spanish-only situation, this added layer is overkill. For a cross-border situation, it is necessary.
2. Crypto inheritance approach
Mi Legado Digital treats crypto as one asset category among many, with standard inventory and instruction documentation.
Arkakey treats crypto as a core specialism, with zero-knowledge architecture matched to the operational profile of self-custody crypto holders.
Sucesio sits between the two: crypto inheritance is a substantial part of the offering, with dedicated content on hardware wallet inheritance for Ledger, Trezor, Coldcard, BitBox and KeepKey, crypto inheritance for expats in Europe, and crypto-specific Spanish content covering Modelo 721 and AEPD positioning. Sucesio explicitly does not store complete seed phrases, treating the cryptographic layer as the user's responsibility and the inventory/map layer as the platform's.
For a user whose crypto is the primary asset class concern, Arkakey is the more focused technical option. For a user whose crypto is one significant part of a broader cross-border estate, Sucesio integrates it into a wider workflow.
3. Distribution and brand presence in Spain
Mi Legado Digital's insurance-company partnerships give it a structural advantage in Spanish brand visibility. A Spanish-resident user is more likely to encounter Mi Legado Digital through their bank's life-insurance offering than to discover Sucesio or Arkakey through search.
Arkakey reaches users through the Spanish crypto community, direct online discovery, and the technology-press channels that cover privacy-focused infrastructure.
Sucesio reaches users primarily through direct online discovery in the expat community and through B2B partnerships with banks, insurance companies, family offices, wealth advisors and specialist wealth lawyers. Sucesio explicitly does not enter commercial partnerships with notarios — a deliberate ethical choice grounded in the public-official nature of the Spanish notarial profession.
For a Spanish-national user choosing between platforms, the distribution map is a relevant signal: it indicates which platform you are most likely to discover, and through whom.
4. Multi-jurisdiction support
This is the dimension where Sucesio is most clearly differentiated.
Mi Legado Digital is Spain-only by design. Arkakey is Spain-anchored. Sucesio is built for the user whose estate, heirs or assets span multiple European jurisdictions — typically Spain plus one or two of France, Germany, Portugal, Italy, the Netherlands or Belgium.
If the user's estate is Spain-only, this differentiation is irrelevant. If the user's estate is cross-border, it is the most important dimension on the table.
5. Language layer
Mi Legado Digital is Spanish. Arkakey is Spanish (possibly with English). Sucesio ships in seven languages.
The language layer matters at execution time, not at signup time. A Spanish-national user with Spanish-speaking heirs will not notice the difference. A British retiree in Málaga whose daughter in Edinburgh does not read Spanish will notice the difference acutely the day the daughter is trying to use the platform to coordinate the estate.
The seven-language coverage is a deliberate operational choice. It reflects who Sucesio is built for: cross-border families where the platform's heirs will not all share a common operational language.
The Notarial Question in Spain
Spain's notarial tradition is strong. The notario público in Spain is a public official with delegated state functions: authenticating public deeds, maintaining registries, ensuring legal certainty in transactions and successions. The public confidence the Spanish notarial profession enjoys rests in part on its structural independence from commercial pressures.
Sucesio's position, applied to the Spanish context: we do not enter commercial partnerships with notarios in Spain. We align informationally with the user's own notario's plan, documenting which notario prepared the escritura pública de aceptación de herencia and ensuring that the user's heirs can coordinate with that specific notario at execution time. But we do not pay notarios, do not receive payment from them, do not enter referral arrangements, and do not market through notarial channels.
Mi Legado Digital and Arkakey do not appear to have made this their primary positioning. Their notarial integration is what it is; we cannot characterise it precisely from public sources alone. Readers for whom this ethical question matters should verify each platform's specific notarial relationships directly.
For more on Sucesio's notarial positioning compared to a platform that has made the opposite choice, see our comparison of Sucesio vs Corvo Luxembourg.
How to Choose
Three questions resolve the choice for almost any Spanish-exposed user:
1. Is your estate Spanish-only, or cross-border with Spanish exposure?
If Spanish-only, Mi Legado Digital or Arkakey are the natural choices. If cross-border, Sucesio is built for that specific combination.
2. What is your relationship to crypto?
If crypto self-custody is your primary concern and you are comfortable with zero-knowledge architecture, Arkakey is the most focused fit. If crypto is one of several asset classes you need to handle alongside cross-border legal and personal-message dimensions, Sucesio integrates them. If crypto is a small part of a mainstream estate, Mi Legado Digital is sufficient.
3. How do your heirs read?
If your heirs all read Spanish comfortably, language coverage does not differentiate. If your heirs read multiple languages and may not all be Spanish-comfortable, Sucesio's seven-language coverage is the more concrete answer.
These three questions do not have universal right answers. Whichever platform's positioning matches more of your three answers is the one built for you.
Frequently Asked Questions
Is Mi Legado Digital better for Spanish-national mainstream users?
For a Spanish-national user with Spanish-only assets and Spanish-only heirs, who values established in-country brand awareness and is comfortable with insurer-distributed products, Mi Legado Digital is a credible default and may well be the right choice. Sucesio does not pretend otherwise.
Is Arkakey the right choice if I only care about crypto?
For a Spanish-resident user whose primary asset class concern is crypto self-custody, who is comfortable with zero-knowledge technical architecture, and whose estate is otherwise simple, Arkakey is the most focused option. Sucesio integrates crypto inheritance into a broader cross-border framework; if you do not need the broader framework, Sucesio is heavier than necessary.
Why is Sucesio not just the best option for everyone?
Because different users need different things. Mi Legado Digital has structural advantages in Spanish-mainstream distribution that Sucesio does not match. Arkakey has technical depth in crypto-specific zero-knowledge architecture that Sucesio does not exceed. Sucesio's specific advantage is the cross-border European combination — not pure Spanish-mainstream depth and not pure crypto-tech depth. Choosing Sucesio for a Spanish-only situation is technically possible but probably overkill.
Does any of these platforms replace a Spanish will?
No. None of the three platforms replaces a testamento. The legal succession layer — handled by your notario through the escritura pública de aceptación de herencia — remains the legal foundation. All three platforms operate as the operational layer that captures what the legal layer cannot: digital assets, crypto wallets, password managers, online accounts, personal messages. The platform is the complement to the will, not the substitute.
How do I verify each platform's current claims?
Verify Mi Legado Digital and Arkakey directly through their public sites and through any partnered distribution channel (insurer, crypto community resource) you encounter them via. Verify Sucesio at sucesio.io. Product details and pricing across all three platforms may evolve; the information in this comparison reflects publicly available information at the date of publication.
Can I use two platforms in parallel?
Technically possible; practically the configurations overlap enough that running two platforms duplicates effort without adding meaningful redundancy. Pick the one whose positioning matches your situation and use it consistently.
This article is informational and does not constitute legal, tax or financial advice. Comparisons reflect publicly available information at the date of publication and may evolve; readers are encouraged to verify current product details directly with each provider before making a decision. Where information about Arkakey or Mi Legado Digital is incomplete or based on indirect sources, we have stated this openly. Last updated: June 2026.
Author: The Sucesio Team. For questions about cross-border digital estate planning, visit sucesio.io.