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Allspark Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
Allspark Electric specializes in residential electrical work while Therma focuses on commercial and industrial mechanical contracting.
| Allspark Electric | Therma | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.6 |
| Years Licensed | 5 years | 9 years |
| License # | 1078865 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | allspark-electric.com | www.therma.com |
Key Differences
What Customers Say
Allspark Electric
Customers emphasize personal service qualities like punctuality, clear communication, and Frank's hands-on involvement in residential electrical projects.
Therma
Customers focus on technical manufacturing capabilities, precision fabrication work, and professional service for commercial and industrial clients.
Key Takeaway: Allspark's reviews come from homeowners praising residential service experience, while Therma's reviews come from commercial clients praising manufacturing and fabrication capabilities.
Customer Reviews
Allspark Electric
Frank offers the kind of service you value and appreciate. Frank and crew showed up on time and had communicated arrival ahead of time. They listened to the problems (a number of them two days befor...
I want to highly recommend Allspark Electric for any of your electric needs. Frank and his brother did an awesome job of redoing my electric panel. Frank communicated so well with PG&E and that made t...
Frank was great. He fixed all my little things in less than two hours, and had everything handy & ready to go. I'd hire him again if I need another electrician!
Therma
Did Stanford blood donation here today.
Can't say enough about this company this group of guys the work that they do and the high technology that they are getting involved in. There is a manager Paul there, great guy hard worker. The compan...
Top notch mechanical contractor. Very professional.
Consider Allspark Electric if...
- ✓ You need residential electrical work of any kind, from minor repairs to whole-house electrical projects
- ✓ You value direct owner involvement and personal attention throughout your project
- ✓ You want a contractor with established relationships with local homeowners and proven repeat business
- ✓ Your project requires coordination with utility companies for panel work or service upgrades
Consider Therma if...
- ✓ You have a commercial or industrial facility requiring HVAC duct manufacturing or custom metal fabrication
- ✓ Your project involves specialty ducting components, medical gas systems, or process equipment
- ✓ You need high-volume manufacturing capabilities for custom mechanical components
- ✓ You're working on a commercial mechanical system rather than residential electrical needs
Questions to Ask Before Hiring
- → Ask Allspark Electric for references from projects similar in scope to yours, particularly if you're planning panel upgrades or whole-house work
- → Ask Therma directly whether they take on residential electrical projects, as their portfolio focuses on commercial mechanical work
- → Confirm project timelines given the different business models, as residential contractors typically schedule differently than commercial fabrication shops
The Bottom Line
This is not a close comparison for residential electrical work. Allspark Electric is a residential electrical contractor built specifically to serve homeowners, with proven experience in panel upgrades, lighting, outlets, and home remodels. Therma is a commercial mechanical contractor specializing in HVAC manufacturing and industrial fabrication. If you need electrical work for your home, choose Allspark Electric. Only consider Therma if you actually need commercial mechanical contracting or custom HVAC fabrication for an industrial facility.
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Frequently Asked Questions
Therma holds a mechanical contractor license and specializes in HVAC and fabrication for commercial clients, not electrical work. If you need residential electrical services, Allspark Electric is the appropriate choice as they specialize in exactly that work.
Not for your decision. While Therma has been licensed longer, they operate in commercial mechanical contracting, not residential electrical. The relevant experience is Allspark's five years serving homeowners with electrical projects, which directly matches typical residential needs.
Allspark Electric is the clear choice for residential panel upgrades. Their reviews specifically mention successful panel replacements with utility coordination, and this work is central to their business. Therma does not appear to perform residential electrical services.
Both companies receive positive reviews for professionalism within their respective markets. However, reliability for your project depends on choosing a contractor who actually serves your market and specializes in your type of work, which means matching residential electrical needs with Allspark or commercial mechanical needs with Therma.
Looking for the Best?
See our ranked list of top electrical contractors in Santa Clara.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 12, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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