Company lists · Data verified August 2026

Top 25 Custom software developers based in Spain

Name: Custom software developers based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,035 companies tracked

There are 1,035 custom software developers headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 7,450 professional contacts across them, including 1,079 with verified work emails and 99 with mobile numbers. Madrid is the largest hub.

This list covers custom software developers headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,035Companies

7,450Contacts tracked

1,079Verified emails

99Mobile numbers

Unlock all 1,035 companies Free account · no credit card · 2 minutes

The 25 largest custom software developers based in Spain

Ranked by team size

Top 25 of 1,035 custom software developers based in Spain, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Atsistemas	Madrid	1,001-5,000	391	61
2	Metaenlace Sistemas DE Información	Murcia.	201-500	268	3
3	Convotis Iberia	Elche	1,001-5,000	208	21
4	Trevenque Group	Granada	51-200	188	49
5	Bitbox S.L	Telde	201-500	187	27
6	Nano Nino INC	Alicante	51-200	165	4
7	Innocv Solutions	Madrid	51-200	151	21
8	Nazaries Intelligenia	Granada	51-200	134	26
9	Premium Minds	Madrid	51-200	126	86
10	Carver Advanced Systems S.L	Barcelona	51-200	97	11
11	Slashmobility	Barcelona	51-200	94	22
12	Mindfactory	Barcelona	11-50	72	23
13	Itequia	Barcelona	51-200	54	8
14	Qualitapps	Barcelona	51-200	49	13
15	Meisters Solutions	Madrid	51-200	46	2
16	Fdsa Desarrollo	Palma	51-200	44	3
17	SFY By Plexus	Barcelona	11-50	43	8
18	Aditelsa	Madrid	51-200	43	2
19	540	n/a	11-50	34	1
20	Actio Procesos Y Tecnología	Zaragoza	51-200	29	5
21	Starshot Software	Leida	51-200	27	8
22	Aner Sistemas Informaticos, S.L	Zarautz	51-200	26	3
23	Salutic	Rincon De La Victoria	11-50	24	4
24	DEMPO	Madrid	11-50	23	2
25	Iagt 'amazing Software'	Sevilla	11-50	22	2

Showing 25 of 1,035 custom software developers based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,079 reachable decision-makers.

Free account · no credit card

See all 1,035 companies

Custom software developers based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 179 HQs

99Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

723

11-50

256

51-200

201-500

501-1,000

1,001-5,000

Custom software developers by metro

Metro	Companies
Custom software developers in Madrid	179
Custom software developers in Barcelona	141
Custom software developers in Valencia	57
Custom software developers in Sevilla	22
Custom software developers in Malaga	22
Custom software developers in Murcia	16
Custom software developers in Cordoba	16

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “custom software developers”, with match quality audited by blind human judging, and headquartered in Spain.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Contact records re-verify on a rolling cadence; 2 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many custom software developers are there based in Spain?

There are 1,035 custom software developers headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

Atsistemas, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most custom software developers?

Madrid leads with 179 headquartered companies, followed by Barcelona (141) and Valencia (57).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,079 verified decision-maker contacts tracked across these 1,035 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,035 custom software developers based in Spain. Start with a free account, no credit card.

Get the full list

Related lists

Custom software developers by geography

Browse the directory

Browse: Companies home · All Spain lists · All Custom software developers lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.