We’ve researched and ranked the best California HTML5 mobile app development agencies that build sophisticated and high-quality apps that help brands drive more loyal customers and sales. Compare listings by past work, reviews, cost and size to pick the best fit for you.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

eSEOspace
VerifiedVerified by the DesignRush team for authenticity and credibility.Award WinnerRecipient of a Best Design Award for outstanding work.Custom Website Design Company. Local US-based team! We Preserve & Optimize your SEO in the Process
Services We Offer: Software, Web Applications. We have 15+ years of experience designing and developing websites and software from scratch. Our background and emphasis in behavior science allows us to creatively design websites and software systems to convert. Call us at: (916) 866-7893 for a quote!...
Top Services:
- Web Design
- Web Development
- WordPress Website Design
- eCommerce Development
- SEO
- Show more
- Location
- San Diego, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $100/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 32 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountseSEOspace Services
Data sourced from the agency's DesignRush profileExecutive Partners Atlantic Partners Corp Canyon Plastics J Allen Fabrics onePRgroup The Sleep Nest EdgeCTP Consultants in Corporate Innovation CalMuni Advisors Avitasen
eSEOspace Reviews & Testimonials

Web Design Review from Muriell Carlisle, LMHC, RAS, C.H.T.
I just want to express my deepest gratitude for all of your help. I can't tell you enough how much I LOVE the website. I think it's so beautiful, professional and elegant. I think it's one of the best therapist's website[s] on the market. :) Thanks to Jeanette and [the] rest of the team for their creativity and neat work and Irina for her incredible knowledge about SEO and resources! You guys rock! (Verified via email)

Web Design Review from Alyssa Brenke
Specifically, working with Ben was amazing! He was incredibly responsive and answered all my questions throughout the process of updating our website. Our original site was built roughly a decade ago (or longer) so we were in need of some streamlining and modernization. The team did just that and quickly! The first iteration was spot on for what we were looking for. Not to mention, they were able to launch quickly and without any interruption to our daily operations. Would 100% recommend [it]!
Web Design Review from George Shvaya
Irina and Ben from [eSEOspace] were a dream to work with! Not only did they turn[...]around work quickly, but their attention to detail is fantastic, as is their regular communication. I will definitely be reaching out to [eSEOspace] again in the future with more work! (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Femtomax Inc.
VerifiedVerified by the DesignRush team for authenticity and credibility.Technology Solutions for You.
Access information technology professionals with experience of working with startups to Fortune 500 companies without breaking the bank. Our services are well suited for retail, manufacturing, startups and healthcare businesses. Talk to us for a free consultation...
Top Services:
- Web Development
- Mobile App Development
- Software Development
- IoT
- AI Development
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- Location
- San Jose, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $35/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 9 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsFemtomax Inc. Services
Data sourced from the agency's DesignRush profileCeeyes Mobility Solutions Pvt. Ltd. Pioneer Property Zone Idaax Technologies Pvt. Ltd.
Scaling New Heights
At HyScaler, we're driven by a mission to be your trusted partner in achieving transformative business objectives. Our global vision focuses on harnessing cutting-edge technologies to craft sustainable, intelligent, and secure solutions...
Top Services:
- Mobile App Development
- Blockchain
- Software Development
- AI Development
- IoT
- Show more
- Location
- Santa Clara, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $40/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsHyScaler Services
Data sourced from the agency's DesignRush profileUrban Sports Club Artisan Stanford University Khelnow Doctegrity EA Tune Protect
HyScaler Reviews & Testimonials
David Robinson's Review Sourced from Google
Can't say enough about this group! Amazing work and great people. You can really tell that the culture here is far above other shops because everyone seemingly loves what they do, and it shows in the final product. Solid work, agreeable rates, and on time delivery. 100% recommend!
Ernesto Berrum's Review Sourced from Google
Great group of people to work with. Very flexible and have been delivering on all of our request in a timely manner. Our platform runs on Ruby on Rails but they have Python, Node.js, React, React, and HTML experts on hand.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsUI/UX Design And Development Firm For Data-driven B2B SaaS Companies
Making complex products simple, useful, and human...
Top Services:
- Digital Services
- Branding
- Product Design
- Web Design
- UI/UX Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $120/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsD.Workz Interactive Services
Data sourced from the agency's DesignRush profileLexisNexis Check Point Ancestry Georgetown University Gett C-Net TravelNet Solutions Collective Health eBay Yahoo!
Reimagining Software Development
Beehive is a new production model for software development (the world's first we should add) that fuses AI precision with human ingenuity. A model of collective intelligence that breaks projects into microtasks, routing them to global experts, and delivering production-ready, high quality, code faster than...
Top Services:
- Web Development
- Software Development
- AI Development
- Mobile App Development
- IoT
- Show more
- Location
- San Jose, California
- Number of Employees
- 100 - 249
- Minimal Budget
- $10,000 - $25,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBeehive Software Services
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Beehive Software Reviews & Testimonials
Paul Cummings's Review Sourced from Google
Beehive Software is simply the best technology partner I have ever worked with. What started as a limited bespoke consumer mobile app SOW quickly grew into more full-scale consumer digital experience support. At the time of this writing, Beehive has delivered 3 major mobile app upgrades for Blue Zones, developed an Online Assessment Portal to support health and wellness survey delivery, and delivered an Analytics PaaS for our enterprise. We have been extremely fortunate to work with top talent like Yaron Hadad and Mor Yariv on our project; their leadership, creativity and partnership IQ have been through the roof. Whether a startup, mid-size, or enterprise-grade customer, Beehive's model allows for scale and delivery support that is really unprecedented in terms of both resource quantity and quality; and it is elastic in a way that benefits their partners.They're really just the bee's knees (pun intended) - and any partner looking to develop exciting and engaging consumer experiences, science-based health and wellness experiences, end-to-end data capture and analytics experiences... hell, *any* experience... would be well-served to consider Beehive Software to be their partner.
Diana Fosha's Review Sourced from Google
an extraordinary collaboration with the AI-developing team at Beehive. respectful, responsive, going out of their way to understand the specifics of our world in the design of the software. i would give them six stars
Jonathan Faran's Review Sourced from Google
Beehive Software is probably the best solution you can get. First of all, the core team - led by Yaron - is one of the most professional in the market, guaranteed. Second, their dedication to delivering an exceptional product on time is truly impressive. Their responsiveness alone speaks volumes. The system they’ve built is also incredibly unique, offering a brilliant way to make development not only faster but also significantly more cost-effective. We've used both their products and services across different parts of our development process, and they’ve proven to be outstanding. We highly recommend Beehive Software to anyone - from small startups to large companies - who want to avoid hiring an entire dev team and instead use a smart, ready-made solution.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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