TL;DR Spain hosts more foreign guest nights than France, Germany or the Netherlands[4], gets plenty of sun and has a stubborn jobs problem among the young. Water is the thing everyone argues about. The ideas that fit best serve hotels and hosts, save water on farms and in towns, put solar to work, and help young people and older residents.

The market in numbers

  • Population: 49,590,099 people on 1 January 2026, a provisional Eurostat figure[1].
  • GDP per capita: about US$38,600 in 2025[2].
  • Internet use: about 96% of people were online in 2024[3].
  • Visitors: non-residents spent about 329 million nights in Spanish tourist accommodation in 2025, more than double France's figure[4].
  • Jobs: unemployment was about 10% in 2025, and about 25% for 15 to 24 year olds[5].
  • Clean power: renewables made up about 47% of electricity output in 2021[6].
  • Currency and tax: the euro since 2002[7], with a standard VAT rate of 21%[8].

What founders here actually have to work with

Tourism is the obvious one. Around 329 million foreign guest nights a year[4] means hotels, holiday rentals, boat operators and restaurants that live and die on the season. They want tools that are cheap in winter and scale in August.

Jobs are the harder truth. With one in four young people in the labour force out of work[5], there is talent waiting, and employers and training providers have reasons to pay for better matching.

Then sun and water. Spain already gets almost half its power from renewables[6], so there is a working solar trade to sell into. Water shortages in the south and east are often in the news [Requires validation], and farms, towns and hotels all feel it. I'd say that's where a careful founder finds the most budget. The SL company form now needs only €1 of capital[9], so the barrier to start is low.

Ideas that fit Spain

Each idea was researched for India. The rupee figures and Indian licences won't apply, so use each page as a brief to rebuild for Spanish buyers.

Hotels, rentals and the coast

  • Guestward: Guest ID checks that store no copies of documents suit hotels and rentals that must register guests [Requires validation]. GDPR compliance is the selling point.
  • Jettycharge: Shared shore charging for small tourist boats fits marinas that want quieter, cleaner harbours. Start with one marina willing to host a trial.
  • Hotelgreens: Rooftop greenhouses on hotels supply the kitchen and give guests a story. Roof loads and permits first.
  • Rainpay: Rain cover that pays on measured rainfall suits outdoor events and festivals. You'd need a licensed insurer to carry the risk.

Water

  • Lowwater: Low-water garden makeovers suit residential complexes and business parks in dry regions. Tie your fee to measured savings.
  • Leakfinder: Acoustic leak surveys paid per verified leak suit town water utilities. Expect tenders and a long first sale.
  • Greywaterly: Greywater-to-flush systems for student halls and hotels cut mains use. Check regional rules on water reuse [Requires validation].
  • Thirstline: A season-ahead water shortfall outlook for each factory site helps food and drink plants plan. Rebuild the data from Spanish basin authorities.
  • Dripservice: Yearly service contracts that keep drip irrigation running evenly suit fruit and vegetable growers. Farm co-ops are the channel.

Sun and power

  • Solarrows: Raised solar rows over crops let farmland keep producing. Grid connection and land rules decide the project [Requires validation].
  • Brightlot: Shared solar plots credited on each power bill suit flat owners with no roof of their own. Check how shared self-consumption works under Spanish rules [Requires validation].
  • Panelfair: Fee-only quote checks for families buying solar suit a busy installer market. Stay independent or the idea falls apart.
  • Bandkeeper: Forecasts that keep small solar plants within their schedules suit a grid with lots of solar. Rebuild the logic around Spanish market rules.

Young people, older people

  • Skillswap: Hour-for-hour skill swaps inside one university or company cost little to run. Start with one campus.
  • Rejoinly: Paid work samples instead of a CV screen help people the usual filters miss. Pitch it to firms hiring at volume.
  • Meritfold: Independent project audits attached to course certificates help young people prove what they can do. Sell to training providers who want their certificates trusted.
  • Helpfold: Hours given to older neighbours now, banked for your own care later, fits towns where families have moved away. Get a town council on board first.
  • Surestride: Live video strength and balance classes for older people travel well across a spread-out country. Don't call it a falls programme until you've checked the health rules.

Rules to check before you start

An SL company can now be formed with capital of at least one euro[9]. Company names are issued through the Registro Mercantil Central[10]. Tax and VAT go through the Agencia Tributaria[11]. Standard VAT is 21%[8]. The Banco de España is the central bank inside the euro system[12], and securities products answer to the CNMV[13]. Tourism, water and health rules are often set by the regions, so check yours [Requires validation].

This is a starting list, not legal advice. Check with a local lawyer or the agency itself.

Questions founders ask

Services run with software and your own time. Panelfair and Skillswap above are cheap to test. An SL can start with €1 of capital[9], though notary and registration costs still apply [Requires validation].

Do foreigners need a local partner to start a company in Spain?

I haven't found a source that says so, but non-EU founders need the right residence permission and a Spanish tax ID [Requires validation]. Check with the Agencia Tributaria[11] or the Registro Mercantil.

How seasonal is a tourism business in Spain?

Very, in most coastal areas [Requires validation]. Price for a quiet winter and a packed summer, and look for customers in cities and business travel to even it out.

Talk to Yash

If you're adapting an Indian idea for Spanish hotels, farms or towns then seasonality and regional rules are where most plans trip, and that's the part I help with. If you need a hand, you know where to find me.

Talk to Yash →

Sources

  1. Eurostat, "Population on 1 January (tps00001)", 2026. https://ec.europa.eu/eurostat/api/dissemination/statistics/1.0/data/tps00001?geo=ES&lastTimePeriod=1
  2. World Bank, "GDP per capita (current US$): Spain", 2025. https://api.worldbank.org/v2/country/ESP/indicator/NY.GDP.PCAP.CD?format=json&mrv=1
  3. World Bank (ITU data), "Individuals using the Internet (% of population): Spain", 2024. https://api.worldbank.org/v2/country/ESP/indicator/IT.NET.USER.ZS?format=json&mrv=1
  4. Eurostat, "Nights spent at tourist accommodation establishments by non-residents (tour_occ_ninat)", 2025. https://ec.europa.eu/eurostat/api/dissemination/statistics/1.0/data/tour_occ_ninat?geo=ES&geo=FR&lastTimePeriod=1&c_resid=FOR&unit=NR&nace_r2=I551-I553
  5. World Bank (ILO estimates), "Unemployment, total" and "Unemployment, youth (% of labour force ages 15-24)": Spain, 2025. https://api.worldbank.org/v2/country/ESP/indicator/SL.UEM.TOTL.ZS?format=json&mrv=1 and https://api.worldbank.org/v2/country/ESP/indicator/SL.UEM.1524.ZS?format=json&mrv=1
  6. World Bank, "Renewable electricity output (% of total electricity output): Spain", 2021. https://api.worldbank.org/v2/country/ESP/indicator/EG.ELC.RNEW.ZS?format=json&mrv=1
  7. European Central Bank, "The euro", 2026. https://www.ecb.europa.eu/euro/html/index.en.html
  8. Your Europe (European Commission), "VAT rules and rates", 2026. https://europa.eu/youreurope/business/taxation/vat/vat-rules-rates/index_en.htm
  9. BOE, Ley 18/2022 de creación y crecimiento de empresas, 2022. https://www.boe.es/buscar/act.php?id=BOE-A-2022-15818
  10. Registro Mercantil Central, 2026. https://www.rmc.es/
  11. Agencia Tributaria, 2026. https://www.agenciatributaria.es/
  12. Banco de España, 2026. https://www.bde.es/wbe/en/
  13. Comisión Nacional del Mercado de Valores, 2026. https://www.cnmv.es/

For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.