Eliran Glazer
Analyst · JPMorgan
Thank you, Eran, and thank you, everyone, for joining our call. Today, I'll review our first quarter fiscal 2024 results in detail and provide updated guidance. Fiscal year '24 is off to another strong start. Total revenue in Q1 '24 came in at $216.9 million, up 34% from the year ago quarter. Our overall net dollar retention rate was stable in Q1 '24 at 110%, reflecting the recent pricing updates and strong down-market demand for our work operating system products. We currently anticipate reported NDR to remain stable throughout fiscal year '24, with an expected small improvement by the end of the year. As a reminder, our net dollar retention is a trailing 4 quarter weighted average calculation.
In Q1, we updated our list prices to better align with the increased value provided by our Work OS platform and product suite to our customers. These adjustments have outperformed our initial forecast and we now anticipate that we generate approximately $25 million in revenue for fiscal year '24.
For the reminder of the financial metrics disclosed, unless otherwise noted, I will be referencing non-GAAP financial measures. We have provided a reconciliation of GAAP to non-GAAP financials in our earnings release. First quarter gross margin was 90%. In the medium to long term, we continue to expect gross margin to remain in the high 80s range.
Research and development expense was $34.8 million in Q1 '24 or 16% of revenue compared to 18% in Q1 '23. Sales and marketing expense was $120.8 million in Q1 '24 or 56% of revenue compared to 63% in Q1 '23. G&A expense was $17.6 million in Q1 '24 or 8% of revenue compared to 10% in Q1 '23.
Net income was $31.7 million in Q1 '24, up from $7.2 million in Q1 '23. Diluted net income per share was $0.61 in Q1 '24 based on 52 million fully diluted shares outstanding.
Total employee head count was 1,987, an increase of 133 employees since Q4 '23. We expect to ramp throughout fiscal year '24 with continued focus on our R&D, product and sales teams as we build out our platform and product suite.
Moving on to the balance sheet and cash flow. We ended the quarter with $1.22 billion in cash and cash equivalents, up from $1.12 billion at the end of Q4 '23. In Q1 '24, free cash flow was a record of $89.9 million and free cash flow margin as defined as free cash flow as a percentage of revenue was 41%. Free cash flow is defined as net cash from operating activities, less cash used for property and equipment and capitalized software costs, excluding nonrecurring items.
Now let's turn to our updated outlook for fiscal year 2024. For the second quarter of fiscal year 2024, we expect our revenue to be in the range of $226 million to $230 million, representing growth of 29% to 31% year-over-year. We expect non-GAAP operating income of $17 million to $21 million, and an operating margin of 8% to 9%. We expect free cash flow of $47 million to $51 million and free cash flow margin of 21% to 22%.
For the full year 2024, we expect revenue to be in the range of $942 million to $948 million, representing growth of 29% to 30% year-over-year. We expect full year non-GAAP operating income of $77 million to $83 million, and an operating margin of 8% to 9%. We expect full year free cash flow of $238 million to $244 million and free cash flow margin of 25% to 26%.
I'll now turn it over to the operator for your questions.