How many employees work at Alter?
Alter SL has approximately 1,161 total employees worldwide as of March 2026, according to Revelio Labs workforce intelligence data. Alter’s total headcount has grown 18.3% from 981 employees in 2023 to 1,161 in 2026.
Is Alter hiring right now?
Yes, Alter is actively hiring. Alter had 12 active job postings in 2026, a 100.0% increase from 2025 — see job openings & hiring trends.
About Alter’s Workforce
Alter SL is a Healthcare and Wellness Services company that employs 1,161 people worldwide as of March 2026. It is the 9th-largest by headcount among its peers. Founded in 1997, the company is headquartered in Madrid, Spain.
Alter's workforce has grown 18.3% from 2023 to 2026, up 1.2% year over year in 2026. Its workforce is concentrated most in Southern Europe (90.6%), followed by Central America and the Caribbean (5.0%) and South America (3.5%).
Alter's functional groups are Finance and Operations (41.1%), Engineering (31.3%), and Sales and Marketing (27.6%), with Finance and Operations growing fastest (up 2.7%). The average salary is $37,969, ranging from a median of $31,000 in Southern Europe to $12,000 in South America, up 0.6% year over year in 2026.
Alter's active job postings rose 100.0% in 2026 to 12, with new postings per month climbing from 7 in 2023 to 9 in 2026. Overall employee sentiment is negative and declining.
Sourced from Revelio Labs workforce data.
- Headquarters
- Madrid, Spain
- Founded
- 1997
- Industry
- Healthcare and Wellness Services
- Employees
- 1,161
- YoY
- +1.2% (+46)
As of March 2026
Alter workforce metrics
Unlock hiring rate, attrition rate, and 12 additional workforce metrics for Alter. Compare to peers, export the dataset, and access the full quarterly history.
Unlock MetricsAlter Annual Employee Count (2023-2026)
- Alter had 1,161 employees in 2026, a 1.2% increase (+46) from 2025.
- Alter had 1,157 employees in 2025, a 2.6% increase (+72) from 2024.
- Alter had 1,085 employees in 2024, a 1.6% increase (+54) from 2023.
- Alter had 1,031 employees in 2023, a 1.3% increase (+54) from 2022.
Alter's total workforce has grown from 981 employees in 2023 to 1,161 in 2026.
Alter SL quarterly employee count
| Year | Qtr | Employees | YoY Change | YoY % |
|---|---|---|---|---|
| 2026 | Q1 | 1,161 | +46 | +1.2% |
| 2025 | Q4 | 1,157 | +72 | +2.6% |
| 2025 | Q3 | 1,151 | +83 | +1.7% |
| 2025 | Q2 | 1,148 | +94 | +1.8% |
| 2025 | Q1 | 1,115 | +65 | +1.5% |
| 2024 | Q4 | 1,085 | +54 | +1.6% |
| 2024 | Q3 | 1,068 | +69 | +2.3% |
| 2024 | Q2 | 1,054 | +73 | +3.0% |
| 2024 | Q1 | 1,050 | +82 | +3.2% |
| 2023 | Q4 | 1,031 | +54 | +1.3% |
| 2023 | Q3 | 999 | +38 | +1.1% |
| 2023 | Q2 | 981 | +34 | +0.9% |
See Alter's complete headcount history, including quarterly breakdowns.
Get the DataAlter Employee Count by Region (2026)
Southern Europe accounts for the largest share of Alter's global workforce with approximately 91% of total employees, followed by Central America and the Caribbean and South America.
Alter employees by region
| Region | Employees | % of Total |
|---|---|---|
| Southern Europe | 1,043 | 90.6% |
| Central America and the Caribbean | 58 | 5.0% |
| South America | 41 | 3.5% |
| Western Europe | 4 | 0.3% |
| North Africa | 3 | 0.3% |
| South Asia | 1 | 0.1% |
| North America | 1 | 0.1% |
| Central and Western Asia | 1 | 0.1% |
Drill into city-level data, hiring trends by region, and historic geographic shifts.
Unlock Geographic DataAlter Employee Count by Department (2026)
Alter's employee groups are Finance and Operations (41.1%), Engineering (31.3%), and Sales and Marketing (27.6%).
Alter employees by department
| Department | Employees | % of Total |
|---|---|---|
| Finance and Operations | 471 | 41.1% |
| Engineering | 358 | 31.3% |
| Sales and Marketing | 317 | 27.6% |
Compare Alter's department mix to industry peers.
See Full DataAlter Employee Salary by Region (2026)
Alter's average employee salary is $37,969 globally. Employees in Southern Europe receive the highest compensation. Pay is lowest in South America, at a median of $12,000.
Alter median employee salary by region (USD)
| Region | Median Salary |
|---|---|
| Southern Europe | $31,000 |
| Western Europe | $24,000 |
| Central America and the Caribbean | $14,000 |
| South America | $12,000 |
Unlock salary by role, level, and city — and compare to Alter's industry peers.
Unlock Salary DataAlter Job Openings and Hiring Trends (2023-2026)
- Alter had 12 active job postings in 2026, a 100.0% increase (+2) from 2025.
- Alter had 10 active job postings in 2025, a 85.7% increase (+6) from 2024.
- Alter had 4 active job postings in 2024, a 120.0% decline (-12) from 2023.
- Alter had 16 active job postings in 2023, a 155.6% increase from 2022.
- Hiring velocity in 2026: 9 new roles/month, up from 6 in 2025 and 6 in 2024.
Alter's hiring is accelerating: active job postings rose 100.0% in 2026 to 12, with new postings per month climbing from 7 in 2023 to 9 in 2026.
Track new postings per month, role-level demand, and hiring velocity vs. peers.
Unlock Hiring DataAlter Employee Sentiment (2026)
Revelio Labs tracks employee sentiment across Alter's workforce based on public professional data. Overall sentiment is negative and has declined year over year in 2026.
Overall
Unlock the full sentiment breakdown by department, tenure, and trend over time.
Unlock SentimentSimilar Companies
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Frequently Asked Questions About Alter
- How fast is Alter growing?
- In 2026, Alter's headcount grew 1.2% to 1,161 employees, up from 1,115 in 2025.
- See the full headcount history
- Where are Alter employees located?
- Most Alter employees are based in Southern Europe (90.6% of headcount), followed by Central America and the Caribbean and South America.
- Explore where the workforce is based
- What is the average salary at Alter?
- The average employee salary at Alter is approximately $38k per year.
- Analyze the salary distribution
- How many new job postings does Alter open per year?
- In Q1 2026, Alter opened 27 new job postings. In 2025, Alter opened 77 new job postings — about 6 per month.
- Track hiring trends by role
- When was Alter founded and where is it headquartered?
- Alter was founded in 1997 and is headquartered in Madrid, Spain.
- Compare Alter to industry peers
Speak with a workforce expert about Alter.
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