Best crypto account abstraction infra in Spain
Candide ranks highest in ChainChoice’s published account abstraction infra ranking among the providers that list Spain, level on published score and weighted total with Pimlico — the published tie-break puts it first — Safe-aligned bundler and paymaster. Form 721 reporting for foreign-held crypto over €50,000 — non-filing penalties are steep, so exchange jurisdiction matters.
Re-read due since
The published cadence is 45 days; this page's next read was due on 11 November 2026.How this page is reviewed
Reviewed means every product ranked on this page was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.
Accountable for this review: Mathias Siemonsmeier, Founder.
How we review · Review calendar · Corrections log · How we make money
Which crypto bundler and paymaster service should Spain residents use in November 2026?
Candide ranks highest in ChainChoice’s published account abstraction infra ranking among the providers that list Spain, level on published score and weighted total with Pimlico — the published tie-break puts it first — Safe-aligned bundler and paymaster. The order is the published ranking itself; providers whose terms exclude Spain are removed. Check authorisation with CNMV before depositing.
- Spain residents holding capital in EUR
- Users who need CNMV-aligned compliance and audit-grade reporting
- Buy-and-hold profiles benefiting from Spain's tax treatment
- Sophisticated retail and family-office treasurers
- Derivatives / perpetuals traders (use a regulated futures venue instead)
- Privacy-focused users avoiding KYC (these are licensed venues)
- Day-traders chasing the lowest spreads regardless of regulator posture
- Anyone needing a service CNMV does not currently authorise
General guidance for Spain: the ranking engine does not compute these notes and they do not change the order below. If none fits you, answer the Find My Best questions for a result for your profile.
8 account abstraction infra listed for Spain
In ChainChoice’s published ranking order, from this category’s 8 providers: those whose terms exclude Spain are removed; naming Spain or a region that covers it counts the same, and those whose terms do not state it come last. Each chip names the basis: a dated check, a region listing, or the provider's own claim.
#1 for SpainCandide#1 globallyProvider states broad availability Safe-aligned bundler and paymaster with a per-plan ladder, running the LGPL-3.0 Voltaire bundler.
Markup on sponsored gas — 9/10Exit path without the vendor — 9/10Published price per user operation — 8/10#2 for SpainPimlico#2 globallyProvider states broad availability ERC-4337 bundler and verifying paymaster sold on metered API credits, with the Alto bundler released under GPL-3.0.
Published price per user operation — 10/10Exit path without the vendor — 9/10#3 for SpainEtherspot (Skandha Bundler and Arka Paymaster)#3 globallyProvider states broad availability Prepaid-credit bundler and paymaster with both components released under MIT and gas billed at network cost.
Markup on sponsored gas — 10/10Published price per user operation — 8/10Exit path without the vendor — 8/10#4 for SpainAlchemy Smart Wallets (Gas Manager and Bundler APIs)#4 globallyProvider states broad availability Bundler and gas manager sold as compute units inside the general Alchemy node platform, running the Rust Rundler bundler.
Published price per user operation — 8/10Exit path without the vendor — 7/10#5 for SpainZeroDev#5 globallyProvider states broad availability Smart account platform with a bundler forked from Pimlico's Alto, owned by Offchain Labs since August 2025.
Published price per user operation — 7/10Markup on sponsored gas — 6/10#6 for Spainthirdweb Account Abstraction#6 globallyProvider states broad availability Bundler and paymaster bundled into a monthly developer platform plan with per-thousand-transaction sponsorship pricing.
Markup on sponsored gas — 8/10Published price per user operation — 7/10#7 for SpainCoinbase Developer Platform Paymaster#7 globallyProvider states broad availability Combined paymaster and bundler on a single endpoint, available on Base only.
Markup on sponsored gas — 6/10Published price per user operation — 3/10#8 for SpainBiconomy#8 globallyProvider states broad availability Cross-chain execution platform whose ERC-4337 bundler and paymaster are now wrapped in a quote-based Supertransaction API.
Exit path without the vendor — 4/10Verified mainnet chain coverage — 4/10
Commission: None of these providers pays ChainChoice anything for these links. Disclosure
Provider links appear once we know which country you are browsing from: ChainChoice links to providers only where it serves in full.
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
- Exit failure: you cannot get out at par, on time, or with what is yours.Scored by Exit path without the vendor · 30% (Candide 9/10, Pimlico 9/10, Etherspot (Skandha Bundler and Arka Paymaster) 8/10)
Each cell is verified against the provider's filings or the CNMV register; a gap shows "—", never an estimate.
| Provider | Taker fee in Spain | KYC tier | EUR rails | CNMV license |
|---|---|---|---|---|
| #1Candide | — | — | — | — |
| #2Pimlico | — | — | — | — |
| #3Etherspot (Skandha Bundler and Arka Paymaster) | — | — | — | — |
| #4Alchemy Smart Wallets (Gas Manager and Bundler APIs) | — | — | — | — |
| #5ZeroDev | — | — | — | — |
Source: ChainChoice provider catalog cross-referenced with the CNMV register; each fee as of its entry's latest verification (accuracy methodology).
Is using a crypto bundler and paymaster service legal in Spain?
Yes. Spain regulates crypto-asset service providers under MiCA (EU Regulation 2023/1114), enforced from 30 December 2024. CNMV oversees account abstraction infra operating in Spain; only providers authorised under MiCA may serve retail clients. Verify any provider against ESMA’s interim MiCA register.
How is crypto taxed in Spain?
Capital gains taxed in tiers: 19% up to €6,000, 21% to €50,000, 23% to €200,000, 27% to €300,000, 28% above. Form 721 declares foreign-held crypto over €50,000. Editorial summary, not tax advice: consult a qualified tax advisor in Spain before filing.
What payment methods work for buying crypto in Spain?
The most common rails for retail onramps in Spain are: SEPA, SEPA Instant, Bizum.
Are international platforms (Coinbase, Kraken, Binance) available in Spain?
Coinbase and Kraken hold MiCA authorisation valid in Spain. Binance does not: no Binance entity is on ESMA's register (read 10 November 2026); every transitional period ended by 1 July 2026, so none covers it there.